20 entries under rival topic. ×

27
foe(noun, opposition, friend, opponent)
22
opponent(noun, person, opposition, enemy)
18
antagonist(noun, person, opposition, friend)
16
adversary(noun, opposition, supporter, opponent)
8
detractor(noun, opposition, opponent, enemy)
5
competitor(noun, opposition, associate, opponent)
3
other side(noun, expression, opposition, associate, side)
3
opposition(noun, associate, competitor, antagonist)
2
attacker(noun, opposition, competitor, antagonist)
2
prosecutor(noun, opposition, associate, competitor)
2
someone competed against(noun, expression, opposition, competitor)
2
someone hated(noun, expression, opposition, competitor)
1
agent(noun, opposition, competitor, antagonist)
1
bandit(noun, opposition, competitor, antagonist)
1
criminal(noun, opposition, competitor, antagonist)
1
guerrilla(noun, opposition, competitor, antagonist)
1
invader(noun, opposition, competitor, antagonist)
1
murderer(noun, opposition, competitor, antagonist)
1
rebel(noun, opposition, competitor, antagonist)
1
spy(noun, opposition, competitor, antagonist)
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APASmart Define. (2016). ally thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/ally/thesaurus/antonyms
ChicagoSmart Define. 2016. "ally thesaurus" https://smartdefine.org/ally/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2016, ally thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/ally/thesaurus/antonyms>.
MLASmart Define. "ally thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/ally/thesaurus/antonyms>