175 entries under doubt topic. ×

35
dispute(noun, verb, support, take, meet)
30
question(noun, verb, order, go, force)
21
oppose(verb, support, take, meet, disregard)
14
query(noun, verb, go, charge, promote)
12
demur(noun, verb, support, act, oppose)
12
opposition(noun, order, disregard, command, disagreement)
11
gainsay(verb, oppose, criticize, dispute, deny)
10
protest(noun, verb, support, act, oppose)
10
contradict(verb, oppose, criticize, dispute, deny)
10
object(verb, support, oppose, ignore, express)
9
impugn(verb, charge, oppose, dispute, deny)
9
ask(verb, state, hold, take, order)
9
cross(verb, stop, take, meet, oppose)
9
fight(noun, verb, take, meet, oppose)
8
deny(verb, oppose, criticize, dispute)
8
inquire(verb, order, go, force, press)
8
resist(verb, support, take, meet, attack)
7
quiz(verb, examine, demand, request)
7
reject(verb, criticize, question, discourage)
6
exception(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>