95 entries under doubt topic. ×

1
vacillate(verb, dispute, challenge, question)
1
waver(verb, dispute, challenge, question)
1
wonder at(verb, expression, dispute, challenge)
1
zap(verb, criticize, dispute, challenge)
1
zing(verb, criticize, dispute, challenge)
0
bump heads(verb, expression, challenge, deny)
0
have reservations about(expression, idiom, question, suspect)
0
kick around(verb, expression, challenge, deny)
0
pick a bone(verb, expression, idiom, challenge, deny)
0
puzzle over(expression, oppose, dispute, suspect)
0
suspicion(oppose, dispute, suspect)
0
thrash out(verb, expression, challenge, deny)
0
toss around(verb, expression, challenge, deny)
0
wonder(dispute, discredit, hesitate, suspect)
0
wonder about(expression, oppose, dispute, suspect)
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APASmart Define. (2015). impugn thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/impugn/thesaurus/synonyms
ChicagoSmart Define. 2015. "impugn thesaurus" https://smartdefine.org/impugn/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, impugn thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/impugn/thesaurus/synonyms>.
MLASmart Define. "impugn thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/impugn/thesaurus/synonyms>