300 Best Friend Synonyms & Antonyms (+ Example Sentences) - Writing Beginner (2024)

The phrase best friend is one of the most endearing terms we use to describe someone.

However, when writing, we might need a variety of expressions to avoid redundancy or better capture the nuances of friendship. Below, you’ll find a massive list of synonyms and antonyms for best friend, complete with example sentences to show you exactly how to use each term.

Best Friend Synonyms

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300 Best Friend Synonyms & Antonyms (+ Example Sentences) - Writing Beginner (1)

Table of Contents

Browse through these best friend synonyms (with explanations and examples) to find the perfect one for your text message, story, paper, letter, or other piece of writing.

1. Confidant
A confidant is someone you trust completely and can share all your secrets with.

Example: “Emma has been my confidant since high school, and I can tell her anything.”

2. Soulmate
A soulmate is someone who understands you perfectly and shares a deep connection.

Example: “I consider Sarah my soulmate because she knows me better than anyone.”

3. Companion
A companion is someone who shares your journey, providing constant support.

Example: “He has been my companion through all the ups and downs in life.”

4. Partner-in-crime
A partner-in-crime is a close friend who often joins you in mischievous adventures.

Example: “My cousin is my partner-in-crime whenever we travel together.”

5. Comrade
A comrade implies a sense of solidarity, often used for a friend who shares your experiences and challenges.

Example: “She was my comrade throughout our years in college.”

6. Buddy
Buddy is a casual, affectionate term for a close friend.

Example: “We’ve been buddies since kindergarten, and nothing has changed.”

7. Sidekick
A sidekick is a loyal friend who is always by your side, ready to assist or support.

Example: “Tom is the best sidekick anyone could ask for, always ready to help.”

8. Confessor
A confessor is someone you can openly confess your feelings and thoughts to without fear of judgment.

Example: “Jane has always been my confessor, the person I turn to when I need to talk.”

9. Bosom Friend
A bosom friend is someone you are very close to, often sharing deep emotional bonds.

Example: “She’s my bosom friend, and I wouldn’t trade our connection for anything.”

10. Mate
Mate is a friendly term often used to describe someone you have a strong connection with, commonly used in British English.

Example: “He’s my closest mate, and I’d do anything for him.”

11. Kindred Spirit
A kindred spirit is someone whose thoughts, feelings, and attitudes closely match yours.

Example: “When we met, it was like I’d found a kindred spirit.”

12. Ride-or-Die
Ride-or-die describes a friend who is fiercely loyal, always ready to support you.

Example: “Jack is my ride-or-die; I know he’s got my back, no matter what.”

13. Ally
An ally is someone who supports you, particularly during difficult times.

Example: “Through thick and thin, she’s always been my ally.”

14. Pal
Pal is an informal term that refers to a friend, often implying familiarity and comfort.

Example: “We’ve been pals for years and have never lost touch.”

15. Bestie
Bestie is an affectionate term for a best friend, commonly used in casual language.

Example: “She’s my bestie, and we do everything together.”

16. Confidante
A confidante is the feminine form of confidant, used for a woman who keeps your secrets.

Example: “My mom has always been my confidante when I needed guidance.”

17. Rock
A rock is someone who provides strength and stability in your life.

Example: “He’s my rock, and I don’t know what I’d do without his support.”

18. True Friend
A true friend is someone loyal and dependable, who stands by you through everything.

Example: “Anna has proved time and again that she is a true friend.”

19. Wingman
A wingman is a friend who helps you in social situations, particularly romantic ones.

Example: “He’s my wingman whenever we go out to meet new people.”

20. Homegirl/Homeboy
Homegirl or homeboy refers to a close friend, especially someone from your hometown or community.

Example: “She’s my homegirl, and we’ve stuck together through everything.”

21. Amigo
An amigo is a friendly term borrowed from Spanish, meaning friend.

Example: “Carlos is my amigo from college, and we still keep in touch regularly.”

22. Chum
A chum is an old-fashioned term for a close friend, often used in British English.

Example: “We were chums since primary school, always playing together.”

23. Friend
While basic, friend can be used as a synonym for best friend in certain contexts.

Example: “She’s not just my best friend, but my closest friend as well.”

24. Friend-o
Friend-o is a playful, informal term for a friend.

Example: “Hey friend-o, want to grab a coffee later?”

25. Matey
Matey is a friendly, informal term, often used in British and Australian English.

Example: “G’day matey, how have you been?”

26. Peep
Peep is a casual, slang term for a friend.

Example: “She’s my peep from the neighborhood, always there when I need her.”

27. Best Bud
Best bud is an affectionate term similar to best friend.

Example: “He’s my best bud, and we’ve been through everything together.”

28. Home Slice
Home slice is a slang term meaning a close friend, particularly in urban contexts.

Example: “What’s up, home slice? Long time no see!”

29. Friend in Need
A friend in need refers to someone who supports you in times of trouble.

Example: “During tough times, she proved to be a true friend in need.”

30. Matelet
Matelet is a diminutive form of mate, meaning a small or dear friend.

Example: “She’s my little matelet, always bringing a smile to my face.”

31. Best Mate
Best mate is commonly used in British and Australian English to refer to a best friend.

Example: “He’s my best mate, and we’ve been inseparable since childhood.”

32. Kindred Soul
A kindred soul is similar to a kindred spirit, indicating a deep and similar connection.

Example: “Meeting her was like finding a kindred soul who truly understands me.”

33. Intimate Friend
An intimate friend is someone you share a very close and personal relationship with.

Example: “As an intimate friend, she knows all my secrets.”

34. BFF (Best Friends Forever)
BFF is an abbreviation often used to denote a best friend.

Example: “We’ve been BFFs since middle school, and that won’t change.”

35. Playmate
A playmate is someone you have fun with, often used for childhood friends.

Example: “She was my first playmate, and we grew up together.”

36. Lifelong Friend
A lifelong friend is someone you’ve known and been friends with throughout your life.

Example: “He’s my lifelong friend; we’ve shared so many memories.”

37. Sibling from Another Mother
This phrase refers to a friend who is as close as a sibling.

Example: “She’s like a sibling from another mother, always supporting me.”

38. Close Companion
A close companion is someone who is near and dear to you.

Example: “He’s my close companion on all my adventures.”

39. Steadfast Friend
A steadfast friend is someone who remains loyal and unwavering.

Example: “Even during hard times, she remained a steadfast friend.”

40. Heartfelt Friend
A heartfelt friend is someone who shares deep and genuine emotions with you.

Example: “Our conversations with my heartfelt friend always leave me feeling better.”

41. True Companion
A true companion is someone who is genuinely present and supportive.

Example: “She has been a true companion through all of life’s challenges.”

42. Trustworthy Friend
A trustworthy friend is someone you can rely on completely.

Example: “I can always count on him as a trustworthy friend.”

43. Constant Friend
A constant friend is someone who is consistently present in your life.

Example: “She’s been a constant friend, never wavering in her support.”

44. Steady Friend
A steady friend is someone who remains reliable and dependable.

Example: “No matter what happens, he’s a steady friend I can depend on.”

45. Dear Friend
A dear friend is someone cherished and valued deeply.

Example: “She’s a dear friend who has always been there for me.”

46. Cherished Friend
A cherished friend is someone you hold in high regard and affection.

Example: “I consider her a cherished friend, and I’m grateful for her presence in my life.”

47. Faithful Friend
A faithful friend is someone who remains loyal and true.

Example: “Throughout the years, he’s been a faithful friend.”

48. Trusted Friend
A trusted friend is someone you have confidence in and rely upon.

Example: “She’s my trusted friend who I can always turn to.”

49. Loyal Companion
A loyal companion is someone who stays committed and supportive.

Example: “He’s my loyal companion on every journey.”

50. Unwavering Friend
An unwavering friend is someone who remains steadfast and reliable.

51. Fellow Traveler
A fellow traveler is someone who shares similar journeys or experiences with you.

Example: “During our backpacking trip across Europe, Maria was my fellow traveler every step of the way.”

52. Emotional Anchor
An emotional anchor is someone who provides stability and support in your life, especially during difficult times.

Example: “During the toughest moments, Alex has been my emotional anchor, always keeping me grounded.”

53. Mate of Mine
Mate of mine is an informal way to refer to a friend.

Example: “She’s not just a colleague; she’s a mate of mine.”

54. Good Egg
A good egg is a friendly and reliable person.

Example: “Tom is such a good egg, always ready to help out.”

55. Best Pal
Best pal is an affectionate term similar to best friend.

Example: “We’ve been best pals since our first day of school.”

56. Amity
Amity refers to friendship and peaceful relations.

Example: “Their amity has lasted through decades of ups and downs.”

57. Friend for Life
A friend for life is someone you intend to remain friends with forever.

Example: “Lily is my friend for life; we’ve shared so many memories together.”

58. Best Companion
A best companion is someone who accompanies you closely in life.

Example: “She has always been my best companion on all my adventures.”

59. Intimate Confidant
An intimate confidant is someone you share your deepest secrets with.

Example: “As my intimate confidant, she understands me like no one else.”

60. Close Ally
A close ally is a friend who supports you in various situations.

Example: “In every project, he’s been my close ally.”

61. Trusted Confidant
A trusted confidant is someone you rely on to keep your secrets.

Example: “She’s my trusted confidant, always there to listen without judgment.”

62. Faithful Companion
A faithful companion is a loyal friend who remains by your side.

Example: “Throughout the years, he has been my faithful companion.”

63. Constant Ally
A constant ally is someone who consistently supports you.

Example: “No matter the situation, she remains my constant ally.”

64. Steadfast Companion
A steadfast companion is a reliable and unwavering friend.

Example: “His steadfast companionship has been invaluable to me.”

65. True Ally
A true ally is a genuine friend who stands by you.

Example: “In times of need, she proved to be a true ally.”

66. Devoted Friend
A devoted friend is someone who is dedicated and loyal.

Example: “He is a devoted friend who always prioritizes our friendship.”

67. Cherished Companion
A cherished companion is a beloved and treasured friend.

Example: “Our walks together make her a cherished companion in my life.”

68. Supportive Friend
A supportive friend is someone who provides encouragement and help.

Example: “She’s always been a supportive friend during tough times.”

69. Trusted Mate
A trusted mate is a reliable and dependable friend.

Example: “You can count on him as a trusted mate in any situation.”

70. Loyal Sidekick
A loyal sidekick is a faithful friend who assists you.

Example: “His role as my loyal sidekick has never been questioned.”

71. Best Brother
Best brother refers to a friend who is like a brother.

Example: “Jake is my best brother, always looking out for me.”

72. Best Sister
Best sister refers to a friend who is like a sister.

Example: “Emma has always been my best sister, sharing all my joys and sorrows.”

73. Kindred Companion
A kindred companion is a friend with whom you share similar interests and values.

Example: “Finding a kindred companion like her was truly a blessing.”

74. Trusted Partner
A trusted partner is a friend you collaborate with and rely on.

Example: “In every venture, he’s been my trusted partner.”

75. Best Mate Forever
Best mate forever emphasizes a lifelong friendship.

Example: “We’ve been best mates forever, and nothing can change that.”

76. Dear Companion
A dear companion is a beloved and cherished friend.

Example: “Traveling with her made her my dear companion.”

77. Loyal Friend
A loyal friend is someone who remains faithful and supportive.

Example: “Through thick and thin, he’s been a loyal friend.”

78. True Pal
A true pal is a genuine and honest friend.

Example: “She’s my true pal, always speaking the truth.”

79. Trusty Friend
A trusty friend is reliable and dependable.

Example: “In every crisis, he’s been my trusty friend.”

80. Faithful Mate
A faithful mate is a loyal and trustworthy friend.

Example: “She’s my faithful mate, always standing by my side.”

81. Constant Companion
A constant companion is a friend who is always present.

Example: “His presence as a constant companion has been comforting.”

82. True Brother/Sister
A true brother/sister is a friend who is like family.

Example: “We’ve been through so much together; she’s my true sister.”

83. Best Friend Forever
Best friend forever emphasizes an enduring friendship.

Example: “No matter where life takes us, she’ll always be my best friend forever.”

84. Forever Friend
A forever friend is someone you intend to remain friends with indefinitely.

Example: “Our bond is unbreakable; she’s my forever friend.”

85. Close Confidant
A close confidant is a friend you share your secrets with.

Example: “He’s my close confidant, the one I turn to in times of need.”

86. True Homie
A true homie is a genuine and trusted friend, often used in informal contexts.

Example: “We’ve known each other since childhood; he’s my true homie.”

87. Best Buddy
Best buddy is an affectionate term for a best friend.

Example: “She’s my best buddy, always ready for an adventure.”

88. Dear Mate
A dear mate is a cherished and beloved friend.

Example: “Through every season, he’s been my dear mate.”

89. Trusted Ally
A trusted ally is a dependable friend who supports you.

Example: “In every challenge, she’s been my trusted ally.”

90. Forever Companion
A forever companion is a friend you plan to stay with forever.

Example: “Our friendship is unending; she’s my forever companion.”

91. Best Confidant
A best confidant is your top person to share secrets with.

Example: “Whenever I’m troubled, I turn to my best confidant.”

92. True Partner
A true partner is a genuine and reliable friend.

Example: “In every project, he’s been my true partner.”

93. Devoted Companion
A devoted companion is a loyal and dedicated friend.

Example: “Her unwavering support makes her my devoted companion.”

94. Sincere Friend
A sincere friend is honest and genuine.

Example: “His sincere friendship means the world to me.”

95. Close Mate
A close mate is a friend you are very close to.

Example: “We’ve shared so many experiences; he’s my close mate.”

96. Best Ally
A best ally is your top supporter.

Example: “In every endeavor, she’s been my best ally.”

97. Stalwart Ally
A stalwart ally is someone who is steadfast, loyal, and reliable in supporting you through thick and thin.

Example: “During all my challenges, Mike has been my stalwart ally, never wavering in his support.”

98. Lifelong Mate
A lifelong mate is a friend you’ve known throughout your life.

Example: “From childhood to adulthood, she’s been my lifelong mate.”

99. Best Bro
Best bro is a casual and affectionate term for a male best friend.

Example: “He’s not just a friend; he’s my best bro.”

100. Best Sis
Best sis is a casual and affectionate term for a female best friend.

Example: “She’s more than a friend; she’s my best sis.”

101. True Homie
A true homie is a genuine and trusted friend, often used in informal contexts.

Example: “No matter what, he’s always been a true homie.”

102. Best Friend Ever
Best friend ever emphasizes an exceptional and enduring friendship.

Example: “She’s truly my best friend ever, always there when I need her.”

103. Closest Friend
A closest friend is someone you are nearest to emotionally.

Example: “Among all my friends, she’s my closest friend.”

104. Best Friend in the World
Best friend in the world highlights the utmost importance of the friendship.

Example: “No one understands me like she does; she’s my best friend in the world.”

105. True Ally
A true ally is a genuine supporter and friend.

Example: “In every battle, he’s been my true ally.”

106. Best Friend of Mine
Best friend of mine is an affectionate way to refer to a best friend.

Example: “She’s a best friend of mine who I cherish deeply.”

107. Trusted Buddy
A trusted buddy is a reliable and dependable friend.

Example: “He’s my trusted buddy, always ready to lend a hand.”

108. Forever Mate
A forever mate is a friend you intend to remain friends with forever.

Example: “Our bond is unbreakable; she’s my forever mate.”

109. Best Friend and More
Best friend and more implies a friendship that might have deeper meanings.

Example: “She’s my best friend and more, someone I can’t imagine life without.”

110. True Comrade
A true comrade is a loyal and faithful friend.

Example: “In every struggle, he’s been my true comrade.”

111. Best Pal in the World
Best pal in the world emphasizes the uniqueness of the friendship.

Example: “She’s my best pal in the world, always there for me.”

112. Heartfelt Companion
A heartfelt companion is a friend with whom you share deep emotions.

Example: “Our talks make her my heartfelt companion.”

113. Best Friend Always
Best friend always signifies an unending friendship.

Example: “No matter where we are, she’s my best friend always.”

114. True Friend for Life
A true friend for life is someone you will remain friends with forever.

Example: “She’s my true friend for life, through every high and low.”

115. Best Friend and Sister
Best friend and sister combines the closeness of friendship and sibling bond.

Example: “She’s not just my friend; she’s my best friend and sister.”

116. Forever Bestie
Forever bestie emphasizes a lifelong best friendship.

Example: “We’ve promised to stay together as forever besties.”

117. Best Friend in Existence
Best friend in existence highlights the unparalleled nature of the friendship.

Example: “Out of everyone I know, she’s my best friend in existence.”

118. Trusted Confidante
A trusted confidante is someone you trust deeply with your secrets.

Example: “She’s been my trusted confidante since we were kids.”

119. Best Friend Extraordinaire
Best friend extraordinaire emphasizes the exceptional qualities of the friend.

Example: “Her kindness makes her my best friend extraordinaire.”

120. True Bestie
A true bestie is a genuine and loyal best friend.

Example: “She’s my true bestie, always understanding me perfectly.”

121. Forever Confidant
A forever confidant is someone you will always trust with your secrets.

Example: “He remains my forever confidant, no matter the circumstances.”

122. Best Friend at Heart
A best friend at heart signifies a deep emotional connection.

Example: “Even though we’re miles apart, she’s my best friend at heart.”

123. Constant Ally
A constant ally is a friend who consistently supports you.

Example: “She’s been my constant ally through every endeavor.”

124. Best Friend for Eternity
A best friend for eternity emphasizes an everlasting friendship.

Example: “Our bond is unbreakable; she’s my best friend for eternity.”

125. True Best Pal
A true best pal is a genuine and trustworthy best friend.

Example: “She’s my true best pal, always there to lift my spirits.”

126. Best Friend in Every Way
A best friend in every way highlights the multifaceted nature of the friendship.

Example: “From laughter to tears, she’s my best friend in every way.”

127. Forever Companion
A forever companion is a friend you plan to stay with forever.

Example: “No matter where life takes us, she’ll always be my forever companion.”

128. Best Friend and Confidant
A best friend and confidant combines friendship with trust.

Example: “She’s not only my friend but also my best friend and confidant.”

129. True Friend Always
A true friend always signifies a consistently genuine friendship.

Example: “She’s a true friend always, through thick and thin.”

130. Best Friend Beyond Compare
A best friend beyond compare emphasizes the unmatched nature of the friendship.

Example: “Out of all my friends, she’s my best friend beyond compare.”

131. Lifelong Companion
A lifelong companion is a friend you’ve known throughout your life.

Example: “He’s been my lifelong companion, sharing every milestone with me.”

132. Best Friend to the End
A best friend to the end signifies a friendship that will last forever.

Example: “No matter what happens, she’s my best friend to the end.”

133. True Friend Forever
A true friend forever emphasizes an enduring and genuine friendship.

Example: “She’s a true friend forever, always by my side.”

134. Best Friend and Supporter
A best friend and supporter combines friendship with encouragement.

Example: “She’s not only my friend but also my best friend and supporter.”

135. Forever Best Companion
A forever best companion signifies a lifelong and loyal friendship.

Example: “Through every journey, he’s been my forever best companion.”

136. Best Friend with Benefits of Friendship
A best friend with benefits of friendship emphasizes the positive aspects of the relationship.

Example: “Our relationship is purely platonic; she’s my best friend with benefits of friendship.”

137. True Best Friend
A true best friend is a genuine and loyal friend.

Example: “She’s my true best friend, always understanding me.”

138. Best Friend in Spirit
A best friend in spirit signifies a deep emotional connection, even if not physically present.

Example: “Even miles away, she’s my best friend in spirit.”

139. Forever Trusty Friend
A forever trusty friend emphasizes reliability throughout time.

Example: “He’s my forever trusty friend, always dependable.”

140. Best Friend for All Seasons
A best friend for all seasons signifies a friendship that endures through all circumstances.

Example: “Through every phase of life, she’s been my best friend for all seasons.”

141. True Soul Companion
A true soul companion emphasizes a deep, soulful connection.

Example: “Her presence is calming; she’s my true soul companion.”

142. Best Friend Through Thick and Thin
A best friend through thick and thin signifies unwavering support.

Example: “No matter what, she’s been my best friend through thick and thin.”

143. Lifelong Bestie
A lifelong bestie is a best friend you’ve known throughout your life.

Example: “From childhood to now, she’s been my lifelong bestie.”

144. Best Friend and Mentor
A best friend and mentor combines friendship with guidance.

Example: “She’s my best friend and mentor, always offering wise advice.”

145. Truest Companion for Life
A truest companion for life signifies a lasting and genuine friendship.

Example: “He’s my truest companion for life, sharing every joy and sorrow.”

146. Best Friend of the Heart
A best friend of the heart emphasizes emotional closeness.

Example: “She’s a best friend of the heart, understanding me deeply.”

147. Forever Trusted Friend
A forever trusted friend is a friend you will always rely on.

Example: “In every challenge, she’s my forever trusted friend.”

148. Best Friend and Confidante
A best friend and confidante combines friendship with trust.

Example: “She’s not only my friend but also my best friend and confidante.”

149. True Lifelong Friend
A true lifelong friend signifies a genuine and enduring friendship.

Example: “We’ve shared so much over the years; she’s my true lifelong friend.”

150. Best Friend Beyond Time
A best friend beyond time emphasizes a timeless and everlasting friendship.

Example: “No matter the years that pass, she’s my best friend beyond time.”

Best Friend Antonyms

The following is a list of best friend antonyms, or words that mean the polar opposite of best friend.

Be careful with the use of these words as they can sometimes trigger defensiveness in others.

1. Enemy
An enemy is someone who is actively opposed to you or wishes you harm.

Example: “He went from being my best friend to my worst enemy after the betrayal.”

2. Rival
A rival is someone who competes with you, often in an unfriendly manner.

Example: “She used to be my closest friend, but now she’s my rival in business.”

3. Foe
A foe is another term for an opponent or adversary, often the opposite of a friend.

Example: “He became a foe after years of being my friend.”

4. Stranger
A stranger is someone you don’t know well, the opposite of a trusted friend.

Example: “It’s sad how we’ve drifted apart to the point where we’re like strangers.”

5. Backstabber
A backstabber is someone who betrays your trust, often pretending to be your friend while working against you.

Example: “I thought she was my friend, but she turned out to be a backstabber.”

6. Betrayer
A betrayer is someone who breaks your trust or loyalty, becoming the opposite of a best friend.

Example: “He was a betrayer, and I could never trust him again.”

7. Adversary
An adversary is someone you’re in conflict with, the opposite of an ally.

Example: “We were once friends, but now he’s my adversary in court.”

8. Opponent
An opponent is someone who is against you, often in a competition or conflict.

Example: “She became my opponent after years of friendship.”

9. Hater
A hater is someone who actively dislikes you or envies you, the opposite of a supportive friend.

Example: “I realized he was just a hater and not a true friend.”

10. Traitor
A traitor is someone who betrays you or your trust, completely opposite to a loyal best friend.

Example: “He acted like a traitor when he spread my secrets.”

11. Acquaintance
An acquaintance is someone you know but do not share a close or intimate bond with.

Example: “We used to be best friends, but now we’re just acquaintances.”

12. Competitor
A competitor is someone who is in rivalry with you, often the opposite of a supportive friend.

Example: “She turned from my best friend to my toughest competitor.”

13. Antagonist
An antagonist is someone who actively opposes you, often creating conflict.

Example: “He used to be on my side, but now he acts like an antagonist.”

14. Nemesis
A nemesis is a long-standing rival or enemy, often seen as the opposite of a close friend.

Example: “We were best friends in school, but she became my nemesis after graduation.”

15. Opposer
An opposer is someone who stands against you, lacking the support expected from a friend.

Example: “Instead of supporting my ideas, he became an opposer.”

16. Contrarian Companion
A contrarian companion is someone who habitually opposes your ideas and beliefs, creating tension in the relationship.

Example: “Whenever I share my plans, she’s always a contrarian companion, challenging every step.”

17. Saboteur
A saboteur is someone who deliberately undermines your efforts or success.

Example: “She acted as a saboteur in our project, causing delays and confusion.”

18. Double-Crosser
A double-crosser is someone who deceives you by acting friendly while having ulterior motives.

Example: “I thought I could trust him, but he turned out to be a double-crosser.”

19. Malefactor
A malefactor is someone who commits wrongdoing or harmful acts against you.

Example: “His actions during the dispute marked him as a malefactor in my eyes.”

20. Underminer
An underminer is someone who weakens your position or efforts behind your back.

Example: “Her constant negative comments made her seem like an underminer rather than a friend.”

21. Deceiver
A deceiver is someone who tricks or lies to you, betraying your trust.

Example: “I trusted him completely, but he turned out to be a deceiver.”

22. False Friend
A false friend is someone who pretends to be your friend but does not have your best interests at heart.

Example: “She smiled to my face but spread rumors behind my back; she was a false friend.”

23. Conniving Friend
A conniving friend is someone who schemes or plots against you for their own benefit.

Example: “Her secretive actions revealed her as a conniving friend.”

24. Malevolent Friend
A malevolent friend is someone who wishes harm or misfortune upon you.

Example: “Her spiteful actions revealed her as a malevolent friend.”

25. Toxic Friend
A toxic friend is someone whose behavior is emotionally damaging or harmful.

Example: “I had to distance myself from a toxic friend to protect my well-being.”

26. Unreliable Friend
An unreliable friend is someone you cannot depend on when you need support.

Example: “He often cancels plans, showing he’s an unreliable friend.”

27. Manipulative Friend
A manipulative friend is someone who tries to control or influence you deceitfully.

Example: “She always twists situations to her advantage, making her a manipulative friend.”

28. Selfish Friend
A selfish friend is someone who prioritizes their own needs over yours.

Example: “She always thinks about herself, making her a selfish friend.”

29. Jealous Friend
A jealous friend is someone who envies your successes or relationships instead of supporting you.

Example: “Her constant jealousy made her a jealous friend rather than a supportive one.”

30. Disloyal Friend
A disloyal friend is someone who does not remain faithful or supportive in the relationship.

Example: “He left me in a time of need, proving to be a disloyal friend.”

31. Detractor
A detractor is someone who disparages or belittles you instead of offering support.

Example: “Instead of encouraging me, he became a detractor of my ideas.”

32. Hostile Friend
A hostile friend is someone who is openly antagonistic and unfriendly towards you.

Example: “After the disagreement, he became a hostile friend.”

33. Unsupportive Friend
An unsupportive friend is someone who does not provide encouragement or help when needed.

Example: “During my struggles, she remained an unsupportive friend.”

34. Inconsiderate Friend
An inconsiderate friend is someone who does not think about your needs or feelings.

Example: “She often forgets important dates, making her an inconsiderate friend.”

35. Callous Friend
A callous friend is someone who is insensitive to your feelings.

Example: “Her harsh words revealed her to be a callous friend.”

36. Insincere Friend
An insincere friend is someone who does not genuinely care about you.

Example: “His false compliments showed he was an insincere friend.”

37. Unkind Friend
An unkind friend is someone who does not show kindness or compassion.

Example: “Her harsh words revealed her as an unkind friend.”

38. Negligent Friend
A negligent friend is someone who fails to take care of your relationship.

Example: “He forgot our plans multiple times, proving to be a negligent friend.”

39. Negatory Friend
A negatory friend is someone who always says no or discourages you.

Example: “Her constant negativity made her a negatory friend.”

40. Dismissive Friend
A dismissive friend is someone who downplays your feelings or achievements.

Example: “She often dismisses my concerns, acting like a dismissive friend.”

41. Egotistical Friend
An egotistical friend is someone who is excessively self-centered.

Example: “His constant focus on himself made him an egotistical friend.”

42. Grudging Friend
A grudging friend is someone who offers friendship reluctantly or with resentment.

Example: “He only helps when he has to; he’s a grudging friend.”

43. Abusive Companion
An abusive companion is someone who mistreats you emotionally or physically.

Example: “Her verbal abuse made her an abusive companion.”

44. Vindictive Friend
A vindictive friend is someone who seeks revenge for perceived wrongs.

Example: “After our fallout, he became a vindictive friend.”

45. Mean-Spirited Friend
A mean-spirited friend is someone who is malicious or unkind.

Example: “Her mean-spirited jokes hurt my feelings, making her a mean-spirited friend.”

46. Aloof Acquaintance
An aloof acquaintance is someone who is emotionally distant and detached.

Example: “His distant behavior made him an aloof acquaintance.”

47. Degrading Friend
A degrading friend is someone who belittles or humiliates you.

Example: “Her hurtful comments made her a degrading friend.”

48. Frustrating Friend
A frustrating friend is someone who consistently causes irritation or annoyance.

Example: “His constant complaining made him a frustrating friend.”

49. Disdainful Friend
A disdainful friend is someone who looks down on you with contempt.

Example: “Her contemptuous remarks made her a disdainful friend.”

50. Overbearing Friend
An overbearing friend is someone who imposes their opinions or desires excessively.

Example: “Her controlling nature made her an overbearing friend.”

51. Uncompassionate Friend
An uncompassionate friend is someone who does not empathize with your feelings.

Example: “She showed no understanding during my crisis, making her an uncompassionate friend.”

52. Negating Friend
A negating friend is someone who undermines your confidence or achievements.

Example: “His constant doubt made him a negating friend.”

53. Resentful Friend
A resentful friend is someone who harbors bitterness towards you.

Example: “After the argument, she became a resentful friend.”

54. Unfaithful Companion
An unfaithful companion is someone who does not remain loyal or trustworthy.

Example: “His betrayal showed he was an unfaithful companion.”

55. Irresponsible Friend
An irresponsible friend is someone who does not take accountability.

Example: “She never keeps her promises, making her an irresponsible friend.”

56. Antipathetic Person
An antipathetic person is someone who feels or expresses a strong dislike.

Example: “His behavior made him seem like an antipathetic person rather than a friend.”

57. Hostile Acquaintance
A hostile acquaintance is someone you know who is unfriendly towards you.

Example: “What was once a friendly relationship has turned into a hostile acquaintance.”

58. Unfriendly Neighbor
An unfriendly neighbor is someone close by who does not exhibit friendliness or support.

Example: “Despite living next door, she’s become an unfriendly neighbor.”

59. Disrespectful Companion
A disrespectful companion is someone who does not show respect towards you.

Example: “His rude behavior made him a disrespectful companion.”

60. Conniving Acquaintance
A conniving acquaintance is someone who schemes or plots against you.

Example: “Her secretive actions revealed her as a conniving acquaintance.”

61. Malicious Friend
A malicious friend is someone who intends to harm or upset you.

Example: “Her spiteful actions hurt me deeply, making her a malicious friend.”

62. Cynical Friend
A cynical friend is someone who doubts the sincerity or goodness of others.

Example: “His cynical outlook made him a challenging cynical friend.”

63. Self-Serving Friend
A self-serving friend is someone who acts primarily for their own benefit.

Example: “He only reaches out when he needs something, proving to be a self-serving friend.”

64. Mean-Hearted Friend
A mean-hearted friend is someone who is unkind and malicious.

Example: “Her mean-hearted comments made her a difficult mean-hearted friend.”

65. Negligent Companion
A negligent companion is someone who fails to care for the relationship.

Example: “His lack of effort made him a negligent companion.”

66. Belligerent Friend
A belligerent friend is someone who is hostile and aggressive.

Example: “Her confrontational attitude turned her into a belligerent friend.”

67. Dismissive Acquaintance
A dismissive acquaintance is someone who disregards your importance or feelings.

Example: “He barely acknowledges my presence, making him a dismissive acquaintance.”

68. Unapproachable Acquaintance
An unapproachable acquaintance is someone who is difficult to interact with.

Example: “His aloofness made him an unapproachable acquaintance.”

69. Uncooperative Friend
An uncooperative friend is someone who does not work well with others.

Example: “He refused to help, making him an uncooperative friend.”

70. Indignant Friend
An indignant friend is someone who feels or shows anger at perceived unfair treatment.

Example: “Her frequent outbursts made her an indignant friend.”

71. Reclusive Acquaintance
A reclusive acquaintance is someone who isolates themselves and does not engage.

Example: “He rarely interacts, making him a reclusive acquaintance.”

72. Ruthless Friend
A ruthless friend is someone who shows no compassion or mercy.

Example: “Her cutthroat tactics proved she was a ruthless friend.”

73. Cold-Hearted Friend
A cold-hearted friend is someone who lacks empathy or kindness.

Example: “His indifferent attitude made him a cold-hearted friend.”

74. Inflexible Friend
An inflexible friend is someone who is unwilling to change or compromise.

Example: “Her stubbornness made her an inflexible friend.”

75. Disdainful Acquaintance
A disdainful acquaintance is someone who shows contempt or scorn towards you.

Example: “His contemptuous remarks made him a disdainful acquaintance.”

76. Grudging Acquaintance
A grudging acquaintance is someone who offers limited or reluctant interaction.

Example: “He only interacts when necessary, making him a grudging acquaintance.”

77. Self-Centered Friend
A self-centered friend is someone who focuses solely on themselves.

Example: “Her constant need to talk about herself made her a self-centered friend.”

78. Unempathetic Friend
An unempathetic friend is someone who does not understand or share your feelings.

Example: “He never listens to my problems, proving to be an unempathetic friend.”

79. Vindictive Acquaintance
A vindictive acquaintance is someone who seeks revenge for perceived wrongs.

Example: “After the disagreement, he became a vindictive acquaintance.”

80. Pessimistic Friend
A pessimistic friend is someone who always expects the worst.

Example: “Her constant negativity made her a pessimistic friend.”

81. Disrespectful Friend
A disrespectful friend is someone who does not show regard or consideration for you.

Example: “His rude remarks made him a disrespectful friend.”

82. Uncaring Companion
An uncaring companion is someone who shows a lack of concern for your well-being.

Example: “His indifferent attitude made him an uncaring companion.”

83. Resentful Acquaintance
A resentful acquaintance is someone who holds bitterness towards you.

Example: “Her lingering resentment turned her into a resentful acquaintance.”

84. Antagonistic Friend
An antagonistic friend is someone who opposes or competes with you instead of supporting you.

Example: “What was once friendship has turned into an antagonistic friendship.”

85. Unkind Companion
An unkind companion is someone who behaves harshly or cruelly.

Example: “His unkind remarks made him an unkind companion.”

86. Disdainful Acquaintance
A disdainful acquaintance is someone who shows contempt or scorn towards you.

Example: “Her contemptuous attitude made her a disdainful acquaintance.”

87. Manipulative Associate
A manipulative associate is someone who tries to control or influence you deceitfully.

Example: “Her manipulative tactics revealed her as a manipulative associate.”

88. Cold Companion
A cold companion is someone who lacks warmth or affection.

Example: “His indifferent attitude made him a cold companion.”

89. Unresponsive Acquaintance
An unresponsive acquaintance is someone who does not react or engage with you.

Example: “He never replies to my messages, proving to be an unresponsive acquaintance.”

90. Critical Rival
A critical rival is someone who competes with you while constantly finding faults.

Example: “Her competitive nature turned her into a critical rival.”

91. Unsanctioned Friend
An unsanctioned friend is someone whose friendship is not officially recognized or accepted.

Example: “Due to their behavior, she became an unsanctioned friend within the group.”

92. Rebellious Friend
A rebellious friend is someone who opposes authority or norms, often causing conflict.

Example: “His rebellious actions made him a challenging rebellious friend.”

93. Negating Associate
A negating associate is someone who undermines your confidence or achievements.

Example: “His constant doubt made him a negating associate.”

94. Mean-Hearted Acquaintance
A mean-hearted acquaintance is someone who is unkind and malicious.

Example: “Her mean-hearted comments made her a difficult mean-hearted acquaintance.”

95. Detached Friend
A detached friend is someone who is emotionally distant.

Example: “His lack of engagement made him a detached friend.”

96. Belligerent Acquaintance
A belligerent acquaintance is someone who is aggressive and hostile.

Example: “His confrontational nature turned him into a belligerent acquaintance.”

97. Unapproachable Friend
An unapproachable friend is someone who is difficult to interact with.

Example: “His aloofness made him an unapproachable friend.”

98. Uncaring Friend
An uncaring friend is someone who shows a lack of concern for your well-being.

Example: “His indifferent attitude made him an uncaring friend.”

99. Disrespectful Acquaintance
A disrespectful acquaintance is someone who does not show respect towards you.

Example: “His rude behavior made him a disrespectful acquaintance.”

100. Unenthusiastic Friend
An unenthusiastic friend is someone who lacks excitement or interest in your life.

Example: “Her indifferent attitude made her an unenthusiastic friend.”

101. Distant Friend
A distant friend is someone who is emotionally or physically far from you.

Example: “Even though we live in different cities, she’s become a distant friend.”

102. Untrustworthy Companion
An untrustworthy companion is someone who cannot be relied upon.

Example: “He never keeps his promises, proving to be an untrustworthy companion.”

103. Overcritical Friend
An overcritical friend is someone who constantly finds faults without offering support.

Example: “Her relentless criticism made her an overcritical friend.”

104. Grudging Associate
A grudging associate is someone who offers limited or reluctant interaction.

Example: “He only interacts when necessary, making him a grudging associate.”

105. Unsympathetic Companion
An unsympathetic companion is someone who does not show compassion or understanding.

Example: “During my tough times, she was an unsympathetic companion.”

106. Hostile Colleague
A hostile colleague is someone you work with who is unfriendly and antagonistic.

Example: “His constant opposition makes him a hostile colleague.”

107. Unapproachable Colleague
An unapproachable colleague is someone who is difficult to interact with in a professional setting.

Example: “Her stern demeanor made her an unapproachable colleague.”

108. Unsupportive Associate
An unsupportive associate is someone who does not offer help or encouragement.

Example: “She never cheers me on, proving to be an unsupportive associate.”

109. Maleficent Friend
A maleficent friend is someone who causes harm or misfortune.

Example: “Her harmful actions revealed her as a maleficent friend.”

110. Ingrate Friend
An ingrate friend is someone who does not show gratitude.

Example: “She never appreciates my help, making her an ingrate friend.”

111. Disdainful Associate
A disdainful associate is someone who shows contempt or scorn towards you.

Example: “His contemptuous attitude made him a disdainful associate.”

112. Unkind Acquaintance
An unkind acquaintance is someone who does not show kindness or consideration.

Example: “His rude behavior made him an unkind acquaintance.”

113. Dismissive Colleague
A dismissive colleague is someone who disregards your contributions or feelings.

Example: “She often dismisses my ideas, acting like a dismissive colleague.”

114. Depriving Associate
A depriving associate is someone who takes more from the relationship than they give.

Example: “He always asks for favors without reciprocating, making him a depriving associate.”

115. Pessimistic Acquaintance
A pessimistic acquaintance is someone who always expects the worst.

Example: “Her constant negativity made her a pessimistic acquaintance.”

116. Uncooperative Acquaintance
An uncooperative acquaintance is someone who does not work well with others.

Example: “He refused to help, making him an uncooperative acquaintance.”

117. Disdainful Colleague
A disdainful colleague is someone who shows contempt or scorn in a professional setting.

Example: “His contemptuous remarks made him a disdainful colleague.”

118. Spiteful Acquaintance
A spiteful acquaintance is someone who acts out of malice or resentment.

Example: “Her spiteful actions hurt me deeply, making her a spiteful acquaintance.”

119. Unenthusiastic Acquaintance
An unenthusiastic acquaintance is someone who lacks excitement or interest in interacting with you.

Example: “Her indifferent attitude made her an unenthusiastic acquaintance.”

120. Mean-Hearted Acquaintance
A mean-hearted acquaintance is someone who is unkind and malicious.

Example: “Her mean-hearted comments made her a difficult mean-hearted acquaintance.”

121. Resentful Colleague
A resentful colleague is someone who harbors bitterness towards you in a professional setting.

Example: “Her lingering resentment turned her into a resentful colleague.”

122. Critical Acquaintance
A critical acquaintance is someone who frequently criticizes you without offering support.

Example: “His constant fault-finding made him a critical acquaintance.”

123. Unsympathetic Colleague
An unsympathetic colleague is someone who does not show compassion or understanding in a professional setting.

Example: “During my tough times, she was an unsympathetic colleague.”

124. Dismissive Partner
A dismissive partner is someone who disregards your contributions or feelings in a partnership.

Example: “He often dismisses my ideas, acting like a dismissive partner.”

125. Unapproachable Partner
An unapproachable partner is someone who is difficult to interact with in a partnership.

Example: “Her stern demeanor made her an unapproachable partner.”

126. Disdainful Partner
A disdainful partner is someone who shows contempt or scorn in a partnership.

Example: “His contemptuous attitude made him a disdainful partner.”

127. Uncooperative Partner
An uncooperative partner is someone who does not work well with others in a partnership.

Example: “He refused to help, making him an uncooperative partner.”

128. Ingrate Associate
An ingrate associate is someone who does not show gratitude in a professional relationship.

Example: “She never appreciates my help, making her an ingrate associate.”

129. Unkind Partner
An unkind partner is someone who does not show kindness or compassion in a partnership.

Example: “His harsh words revealed him as an unkind partner.”

130. Resentful Partner
A resentful partner is someone who harbors bitterness towards you in a partnership.

Example: “After the disagreement, he became a resentful partner.”

131. Manipulative Partner
A manipulative partner is someone who tries to control or influence you deceitfully in a partnership.

Example: “She always twists situations to her advantage, making her a manipulative partner.”

132. Depriving Partner
A depriving partner is someone who takes more from the relationship than they give.

Example: “He always asks for favors without reciprocating, making him a depriving partner.”

133. Critical Partner
A critical partner is someone who frequently criticizes you in a partnership.

Example: “Instead of supporting me, she became a critical partner.”

134. Unenthusiastic Partner
An unenthusiastic partner is someone who lacks excitement or interest in the relationship.

Example: “Her indifferent attitude made her an unenthusiastic partner.”

135. Hostile Partner
A hostile partner is someone who is openly antagonistic and unfriendly in a partnership.

Example: “After the argument, he became a hostile partner.”

136. Vindictive Associate
A vindictive associate is someone who seeks revenge for perceived wrongs in a professional relationship.

Example: “After the disagreement, he became a vindictive associate.”

137. Belligerent Partner
A belligerent partner is someone who is aggressive and hostile in a partnership.

Example: “Her confrontational attitude turned her into a belligerent partner.”

138. Spiteful Partner
A spiteful partner is someone who acts out of malice or resentment in a partnership.

Example: “Her spiteful actions hurt me deeply, making her a spiteful partner.”

139. Selfish Associate
A selfish associate is someone who prioritizes their own needs over yours in a professional relationship.

Example: “He only thinks about himself, making him a selfish associate.”

140. Pessimistic Associate
A pessimistic associate is someone who always expects the worst in a professional relationship.

Example: “Her constant negativity made her a pessimistic associate.”

141. Resentful Acquaintance
A resentful acquaintance is someone who harbors bitterness towards you.

Example: “Her lingering resentment turned her into a resentful acquaintance.”

142. Untrustworthy Partner
An untrustworthy partner is someone who cannot be relied upon in a partnership.

Example: “He never keeps his promises, proving to be an untrustworthy partner.”

143. Inflexible Associate
An inflexible associate is someone who is unwilling to change or compromise in a professional relationship.

Example: “Her stubbornness made her an inflexible associate.”

144. Unkind Associate
An unkind associate is someone who does not show kindness or compassion in a professional relationship.

Example: “His harsh words revealed him as an unkind associate.”

145. Unresponsive Partner
An unresponsive partner is someone who does not react or engage when needed in a partnership.

Example: “When I needed help, he was an unresponsive partner.”

146. Uncompassionate Associate
An uncompassionate associate is someone who does not empathize with your feelings in a professional relationship.

Example: “She showed no understanding of my situation, making her an uncompassionate associate.”

147. Negligent Acquaintance
A negligent acquaintance is someone who fails to take care of the relationship.

Example: “His lack of effort made him a negligent acquaintance.”

148. Critical Colleague
A critical colleague is someone who constantly finds faults in your work.

Example: “His harsh feedback made him a critical colleague.”

149. Spiteful Acquaintance
A spiteful acquaintance is someone who acts out of malice or resentment.

Example: “Her spiteful actions hurt me deeply, making her a spiteful acquaintance.”

150. Unfaithful Associate
An unfaithful associate is someone who does not remain loyal or trustworthy in a professional relationship.

Example: “His betrayal showed he was an unfaithful associate.”

Watch this video for other ways to say best friend:

Tips for Choosing the Right Best Friend Synonym or Antonym

Choosing the right synonym or antonym for best friend depends on various factors:

1. Context Matters
Consider the nature of your relationship. Terms like soulmate and confidant might fit a deeper, more emotional bond, while buddy or pal can be used for more casual relationships.

2. Emotional Tone
The emotional tone of your writing also dictates your word choice. If you are writing something lighthearted, partner-in-crime or bestie works well. For serious or intense relationships, kindred spirit may be better.

3. Degree of Relationship
Some synonyms imply different depths of friendship. Ally might mean someone who supports you but doesn’t share the closeness of a bosom friend.

4. Audience Understanding
Choose words your audience will understand. Words like companion are straightforward, while terms like confidante might need more context.

5. Negative Relationships
When considering antonyms, think about whether you’re writing about a complete betrayal (traitor), simple distance (stranger), or a rivalry (rival).

Final Thoughts: Best Friend Synonyms and Antonyms

I hope you have enjoyed this mega list of best friend synonyms and antonyms.

Did we just become best friends? I think we did. For even more fun guides to words and writing, check out some of our other articles below.

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