224 entries under verb topic. ×

6
fluctuate(stop, dispute, challenge, question)
6
impugn(dispute, challenge, deny, question)
5
be suspicious of(expression, idiom, suspect, distrust)
5
call in question(expression, idiom, oppose, dispute)
5
deny(decline, reject, dispute, challenge)
5
oppose(decline, reject, dispute, refuse)
4
be dubious(expression, idiom, dispute, challenge)
4
be uncertain(dispute, challenge, question, suspect)
4
disagree(decline, reject, oppose, refuse)
4
discount(disregard, ignore, question, overlook)
4
have reservations(expression, question, suspect, distrust)
4
misgive(dispute, challenge, question, suspect)
4
repudiate(decline, reject, refuse, renounce)
4
smell a rat(expression, idiom, dispute, challenge)
3
wonder at(expression, phrasal verb, dispute, challenge)
3
debate(noun, stop, oppose, dispute)
3
hold(adverb, consider, assume, think)
3
protest(noun, difficulty, issue, dislike)
3
surmise(noun, consider, dispute, challenge)
2
ban(decline, reject, oppose, refuse)
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APASmart Define. (2016). doubt thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/doubt/thesaurus/synonyms
ChicagoSmart Define. 2016. "doubt thesaurus" https://smartdefine.org/doubt/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, doubt thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/doubt/thesaurus/synonyms>.
MLASmart Define. "doubt thesaurus" 2 March 2016. Web. 22 September 2026. <https://smartdefine.org/doubt/thesaurus/synonyms>