Synonyms|930Antonyms|415|Broader|15Narrower|12Related|3.8k

70 entries under expression topic. ×

10
in question(adjective, idiom, clear, obscure)
7
in doubt(adjective, idiom, clear, certain)
4
not kosher(suspect, shady)
4
open to question(adjective, idiom, uncertain, doubtful)
2
beyond belief(extraordinary, amazing, incredible)
2
hard to believe(adjective, idiom)
2
of two minds(idiom, open, uncertain, hesitant)
2
open to doubt(idiom, uncertain, doubtful, astonishing)
1
at loose ends
1
betwixt and between(adjective, idiom, open, uncertain)
1
for the birds(idiom, extraordinary, unreasonable, astonishing)
1
full of holes(idiom, extraordinary, unreasonable, astonishing)
1
hanging by a thread(adjective, idiom, delicate, uncertain)
1
hard of belief
1
in a quandary(adjective, idiom, uncertain, nervous)
1
in clouds(uncertain, hesitant, unsure)
1
in dilemma(uncertain, hesitant, unsure)
1
infirm of purpose
1
like doubting Thomas(idiom, uncertain, hesitant, unsure)
1
more than doubtful
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ChicagoSmart Define. 2016. "dubious thesaurus" https://smartdefine.org/dubious/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, dubious thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/dubious/thesaurus/synonyms>.
MLASmart Define. "dubious thesaurus" 4 March 2016. Web. 22 September 2026. <https://smartdefine.org/dubious/thesaurus/synonyms>