175 entries under doubt topic. ×

6
negate(verb, oppose, criticize, dispute, deny)
6
object to(verb, expression, phrasal verb, oppose, fight)
6
rebut(verb, oppose, deny, question)
6
remonstration(noun, support, act, issue, dislike)
5
attack(verb, stop, meet, oppose, halt)
5
call in question(verb, expression, idiom, oppose, dispute)
5
clash(noun, verb, meet, attack, oppose)
5
confute(verb, oppose, deny, question)
5
contend(verb, take, meet, attack, run)
5
controvert(verb, oppose, dispute, deny)
5
disagree(verb, meet, oppose, criticize, ignore)
5
discredit(verb, charge, dispute, question)
5
mistrust(verb, dispute, question, hesitate)
5
rejection(noun, dislike, disagreement, opposition)
5
remonstrance(noun, support, act, dispute, issue)
4
debate(noun, verb, oppose, dispute, difficulty)
4
difficulty(noun, issue, dislike, question)
4
distrust(verb, oppose, dispute, question)
4
examine(verb, demand, request, question)
4
expostulation(noun, support, act, dislike)
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APASmart Define. (2016). challenge thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/challenge/thesaurus/synonyms
ChicagoSmart Define. 2016. "challenge thesaurus" https://smartdefine.org/challenge/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, challenge thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/challenge/thesaurus/synonyms>.
MLASmart Define. "challenge thesaurus" 1 April 2016. Web. 22 September 2026. <https://smartdefine.org/challenge/thesaurus/synonyms>