Synonyms|423Antonyms|173|Broader|16Narrower|14Related|392
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backing
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bedfellow
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bolsterer
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booster
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bosom buddy(expression, rival)
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boyfriend
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brother
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bystander
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campaigner
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captivation
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classmate
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classmates
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close friend
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coadjutor
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cohort(noun, partner)
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collaboration
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combination
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concession
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concurrence
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confederacy
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APASmart Define. (2016). opponent thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/opponent/thesaurus/antonyms
ChicagoSmart Define. 2016. "opponent thesaurus" https://smartdefine.org/opponent/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2016, opponent thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/opponent/thesaurus/antonyms>.
MLASmart Define. "opponent thesaurus" 30 March 2016. Web. 24 September 2026. <https://smartdefine.org/opponent/thesaurus/antonyms>