74 entries under impugn topic. ×

40
question(noun, verb, get, go, charge)
12
challenge(verb, go, charge, promote, oppose)
12
dispute(noun, verb, get, oppose, provoke)
12
doubt(noun, verb, trouble, concern, dispute)
8
mistrust(noun, verb, trouble, oppose, concern)
7
distrust(noun, verb, trouble, oppose, concern)
7
suspect(verb, dispute, challenge, doubt, question)
5
call in question(expression, idiom, dispute, challenge, doubt)
4
be curious(verb, dispute, challenge, think, doubt)
4
debate(noun, verb, dispute, challenge, question)
3
be dubious(verb, dispute, challenge, doubt, question)
3
be uncertain(verb, dispute, challenge, doubt, question)
3
disbelieve(verb, dispute, challenge, think, doubt)
3
misdoubt(verb, dispute, challenge, doubt, question)
3
misgive(verb, dispute, challenge, doubt, question)
3
scruple(noun, verb, trouble, concern, dispute)
3
smell a rat(expression, idiom, dispute, challenge, doubt)
2
be apprehensive of(verb, dispute, challenge, doubt, question)
2
be in a quandary(verb, dispute, challenge, doubt, question)
2
be puzzled(verb, dispute, challenge, doubt, question)
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APASmart Define. (2016). query thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/query/thesaurus/synonyms
ChicagoSmart Define. 2016. "query thesaurus" https://smartdefine.org/query/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, query thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/query/thesaurus/synonyms>.
MLASmart Define. "query thesaurus" 17 February 2016. Web. 21 September 2026. <https://smartdefine.org/query/thesaurus/synonyms>