165 entries under doubtful topic. ×

4
mysterious(unusual, strange, uncertain, odd)
4
open to question(expression, adjective, idiom, uncertain)
4
remote(adjective, unlikely, improbable)
4
risky(adjective, weak, delicate, uncertain, sensitive)
4
rocky(adjective, weak, delicate, uncertain, sensitive)
4
strange(adjective, unusual, fantastic, irregular)
4
unconvinced(adjective, uncertain, nervous, unsettled)
4
undetermined(adjective, open, rough, uncertainty, uncertain)
4
unimaginable(adjective, extraordinary, amazing, unlikely)
4
unsafe(adjective, delicate, uncertain, unstable, dishonest)
4
untrusty(adjective, false, uncertain, nervous, dishonest)
3
dicey(adjective, delicate, uncertain, unstable, irregular)
3
diffident(adjective, uncertain, nervous, hesitant)
3
enigmatic(uncertain, vague, unclear, tricky)
3
fanciful(adjective, fantastic, unlikely, implausible)
3
hazardous(adjective, open, delicate, uncertain, unstable)
3
inconclusive(adjective, clear, certain, uncertain)
3
perilous(adjective, delicate, uncertain, unstable)
3
questioning(adjective, uncertain, nervous, unsettled)
3
wobbly(adjective, uncertain, nervous, unstable)
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APASmart Define. (2016). dubious thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/dubious/thesaurus/synonyms
ChicagoSmart Define. 2016. "dubious thesaurus" https://smartdefine.org/dubious/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, dubious thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/dubious/thesaurus/synonyms>.
MLASmart Define. "dubious thesaurus" 4 March 2016. Web. 27 September 2026. <https://smartdefine.org/dubious/thesaurus/synonyms>