9
resister(noun, support, person, resist)
7
contrary
7
hostile(noun, adjective, evil, awful, enemy)
6
bully(noun, combatant, fighter)
5
adverse
5
anti(noun, adjective, person, informal, match)
5
archenemy(noun, opposition, agent, rebel, criminal)
5
bandit(noun, person, evil, informal, awful)
5
battler(noun, combatant, fighter)
5
brawler(noun, combatant, fighter)
5
bruiser(noun, combatant, fighter)
5
foeman(noun, evil, awful, enemy, foe)
5
jouster(noun, combatant, fighter)
5
man-at-arms(noun, combatant, fighter)
5
match(noun, person, balance, equal, equivalent)
5
mercenary(noun, combatant, fighter)
5
militant(noun, combatant, fighter)
5
pugilist(noun, combatant, fighter)
5
unfriendly(noun, adjective, enemy)
4
antagonistic
10 years ago|10k views|share |citing 
APASmart Define. (2016). opponent thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/opponent/thesaurus/synonyms
ChicagoSmart Define. 2016. "opponent thesaurus" https://smartdefine.org/opponent/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, opponent thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/opponent/thesaurus/synonyms>.
MLASmart Define. "opponent thesaurus" 30 March 2016. Web. 21 September 2026. <https://smartdefine.org/opponent/thesaurus/synonyms>