107 entries under challenge topic. ×

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agitate(verb, deny, question, contest)
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altercate(verb, deny, question, contest)
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argue(verb, oppose, dispute, question)
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attack(verb, dispute, question, query)
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bicker(verb, deny, question, contest)
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break(verb, dispute, question, query)
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bump heads(verb, expression, deny, question)
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canvass(verb, deny, question, contest)
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clash(verb, deny, question, contest)
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contend(verb, deny, question, contest)
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discept(verb, deny, question, contest)
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go for it(verb, expression, idiom, oppose, dispute)
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go for jugular(verb, expression, idiom, oppose, dispute)
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hassle(verb, deny, question, contest)
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jockey for position(verb, expression, idiom, oppose, dispute)
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kick around(verb, expression, deny, question)
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litigate(verb, oppose, dispute, question)
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lock horns(verb, expression, question, contest)
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mix it up with(verb, expression, idiom, oppose, dispute)
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pick a bone(verb, expression, idiom, deny)
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APASmart Define. (2016). doubt thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/doubt/thesaurus/synonyms
ChicagoSmart Define. 2016. "doubt thesaurus" https://smartdefine.org/doubt/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, doubt thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/doubt/thesaurus/synonyms>.
MLASmart Define. "doubt thesaurus" 2 March 2016. Web. 23 September 2026. <https://smartdefine.org/doubt/thesaurus/synonyms>