Synonyms|179Antonyms|72|Broader|1Narrower|19Related|77
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invoker
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matchup
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mountaineer
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nemesis
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objector
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opposite number(noun, expression, rival, opponent, peer)
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oppositionist(noun, opponent)
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oppugner(noun, rival, opponent)
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other side(noun, expression, rival, opponent)
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participator
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peer(noun, opponent, competitor)
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people competing(noun, expression, rival, opponent)
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person(noun, rival, opponent)
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pretender(noun, contestant)
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qualifier
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rater
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rebel(noun, rival, opponent)
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refuter
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resister(noun, opponent)
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resistor
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APASmart Define. (2015). challenger thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/challenger/thesaurus/synonyms
ChicagoSmart Define. 2015. "challenger thesaurus" https://smartdefine.org/challenger/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, challenger thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/challenger/thesaurus/synonyms>.
MLASmart Define. "challenger thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/challenger/thesaurus/synonyms>