54 entries under tricky topic. ×

51
uncertain(noun, adjective, clear, open, weak)
50
dubious(noun, adjective, clear, open, great)
39
questionable(noun, adjective, clear, great, obscure)
27
unsure(noun, adjective, clear, open, weak)
21
debatable(noun, adjective, open, certain, uncertain)
20
disputable(noun, adjective, open, certain, uncertain)
19
problematic(adjective, clear, open, rough, delicate)
18
unsettled(noun, adjective, open, weak, rough)
16
suspect(verb, adjective, great, honest, extraordinary)
15
iffy(noun, adjective, clear, open, delicate)
15
moot(noun, adjective, open, certain, uncertain)
15
equivocal(adjective, clear, open, obscure, rough)
14
ambiguous(adjective, clear, open, obscure, rough)
14
dubitable(adjective, clear, certain, uncertain, unsettled)
14
indecisive(adjective, clear, open, weak, delicate)
13
unreliable(adjective, delicate, uncertain, nervous, unstable)
12
borderline(adjective, clear, open, delicate, certain)
11
chancy(noun, adjective, clear, delicate, certain)
10
arguable(noun, adjective, certain, uncertain, unsettled)
10
insecure(adjective, delicate, uncertain, awkward, nervous)
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APASmart Define. (2016). doubtful thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/doubtful/thesaurus/synonyms
ChicagoSmart Define. 2016. "doubtful thesaurus" https://smartdefine.org/doubtful/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, doubtful thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/doubtful/thesaurus/synonyms>.
MLASmart Define. "doubtful thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/doubtful/thesaurus/synonyms>