1. (noun) opposition, opponent, opposite
a contestant that you are matched against
Synonyms: foe, opposite, contrary, confrontation, enemy, opposer, resistance, foeman, antagonist, opponent, reverse, adversary, opposition, inverse, opposite word, antonym, resister, oppositeness
Antonyms: amicable
2. (adj) adversary, antagonist, opponent, opposer, resister
someone who offers opposition
Synonyms: obstructionist, opposer, obstructer, obstructor, opposite, antagonist, adversary, opposition, opponent, thwarter, resister
Antonyms: amicable
3. (adj) opponent, opposing
characterized by active hostility
Synonyms: opponent, opposing
Antonyms: amicable
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Synonyms and Antonyms of opponent 
