356 entries under adjective topic. ×

14
incredulous(doubtful, skeptical, unbelieving)
14
equivocal(clear, open, rough, delicate)
14
obscure(rough, uncertain, unreasonable, doubtful)
14
undependable(uncertain, nervous, dishonest, doubtful)
13
iffy(clear, open, delicate, informal)
13
improbable(uncertain, unreasonable, doubtful, likely)
13
shaky(delicate, uncertain, nervous, unstable)
12
indecisive(clear, open, delicate, certain)
12
distrustful(uncertain, nervous, doubtful, unsettled)
12
dubitable(clear, certain, uncertain, anxious)
12
moot(noun, open, uncertain, doubtful)
12
skeptical(certain, doubt, uncertain, nervous)
12
unclear(clear, open, rough, certain)
11
hesitant(open, uncertain, nervous, doubtful)
10
implausible(great, slight, extraordinary, amazing)
10
in question(expression, idiom, clear, obscure)
10
arguable(noun, uncertain, doubtful, unsettled)
10
disreputable(uncertain, doubtful, unsettled, unpredictable)
10
fly-by-night(uncertain, nervous, dishonest, doubtful)
10
problematical(clear, certain, uncertain, doubtful)
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APASmart Define. (2016). dubious thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/dubious/thesaurus/synonyms
ChicagoSmart Define. 2016. "dubious thesaurus" https://smartdefine.org/dubious/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, dubious thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/dubious/thesaurus/synonyms>.
MLASmart Define. "dubious thesaurus" 4 March 2016. Web. 24 September 2026. <https://smartdefine.org/dubious/thesaurus/synonyms>