3
mistrustful(wary, distrustful)
3
moot(adjective, open, uncertain, doubtful, unsettled)
3
skeptical(adjective, certain, doubt, uncertain, doubtful)
3
suspect(adjective, uncertain, doubtful, shaky, unsure)
3
suspecting(adjective, careful, doubtful, suspicious, wary)
3
unresolved(adjective, open, uncertain, doubtful, unsettled)
3
wary(mistrustful, distrustful)
2
at issue
2
controversial
2
dubitable(adjective, clear, obscure, certain, uncertain)
2
equivocal(adjective, clear, open, obscure, certain)
2
indefinite(adjective, open, obscure, doubtful, shaky)
2
open to question(expression, adjective, idiom)
2
question
2
questioning(uncertain, doubtful, wary, unsure, mistrustful)
2
sceptical
2
speculative(doubtful, shaky, vague, unsure, unlikely)
2
unclear(adjective, clear, open, obscure, certain)
2
unsettled(adjective, open, uncertain, doubtful, vague)
1
agnostic
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APASmart Define. (2015). in doubt thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/in_doubt/thesaurus/synonyms
ChicagoSmart Define. 2015. "in doubt thesaurus" https://smartdefine.org/in_doubt/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, in doubt thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/in_doubt/thesaurus/synonyms>.
MLASmart Define. "in doubt thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/in_doubt/thesaurus/synonyms>