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

2 senses of opponent

Sense 1
opposition, opponent, opposite -- (a contestant that you are matched against)
       => contestant -- (a person who participates in competitions)

Sense 2
adversary, antagonist, opponent, opposer, resister -- (someone who offers opposition)
       => person, individual, someone, somebody, mortal, soul -- (a human being; "there was too much for one person to do")

Antonyms of adj opponent

1 sense of opponent

Sense 1
opponent, opposing -- (characterized by active hostility; "opponent (or opposing) armies")

INDIRECT (VIA hostile) -> amicable -- (characterized by friendship and good will)

Similarity of adj opponent

1 sense of opponent

Sense 1
opponent, opposing -- (characterized by active hostility; "opponent (or opposing) armies")
       => hostile (vs. amicable) -- (characterized by enmity or ill will; "a hostile nation"; "a hostile remark"; "hostile actions")