Antonyms of noun friend

1 of 5 senses of friend

Sense 2
ally, friend -- (an associate who provides cooperation or assistance; "he's a good ally in fight")
       Antonym of foe (Sense 2)
      => foe, enemy -- (a personal enemy; "they had been political foes for years")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun friend

5 senses of friend

Sense 1
friend -- (a person you know well and regard with affection and trust; "he was my best friend at the university")
       => person, individual, someone, somebody, mortal, soul -- (a human being; "there was too much for one person to do")

Sense 2
ally, friend -- (an associate who provides cooperation or assistance; "he's a good ally in fight")
       => associate -- (a person who joins with others in some activity or endeavor; "he had to consult his associate before continuing")

Sense 3
acquaintance, friend -- (a person with whom you are acquainted; "I have trouble remembering the names of all my acquaintances"; "we are friends of the family")
       => person, individual, someone, somebody, mortal, soul -- (a human being; "there was too much for one person to do")

Sense 4
supporter, protagonist, champion, admirer, booster, friend -- (a person who backs a politician or a team etc.; "all their supporters came out for the game"; "they are friends of the library")
       => advocate, advocator, proponent, exponent -- (a person who pleads for a cause or propounds an idea)

Sense 5
Friend, Quaker -- (a member of the Religious Society of Friends founded by George Fox (the Friends have never called themselves Quakers))
       => Christian -- (a religious person who believes Jesus is the Christ and who is a member of a Christian denomination)