Synonyms|451Antonyms|268|Broader|4Narrower|8Related|1.1k

80 entries under doubtful topic. ×

1
unheard of(adjective, light, thin, rare)
1
unreliable(uncertain, unsure)
1
unsubstantial(extraordinary, strange, unbelievable, implausible)
1
unsure(adjective, open, obscure, uncertain)
1
untoward(adjective, dubious, improbable)
1
untrustworthy(uncertain, unsure)
1
untrusty(uncertain, unsure)
1
wavering(uncertain, unsure)
0
contrary(adjective, dubious, improbable)
0
hundred-to-one
0
impracticable(implausible, idealistic, improbable)
0
in doubt(expression, uncertain, shaky, unsure)
0
not expected(expression, implausible)
0
not probable(expression, adjective, dubious, improbable)
0
pseudo(adjective, dubious, suspicious)
0
questioning(uncertain, unsure)
0
shaky(adjective, dubious, suspicious, insecure)
0
slim and none(expression, idiom, implausible)
0
suspected(adjective, dubious, suspicious)
0
thick(adjective, dubious, suspicious)
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APASmart Define. (2015). unlikely thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unlikely/thesaurus/synonyms
ChicagoSmart Define. 2015. "unlikely thesaurus" https://smartdefine.org/unlikely/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, unlikely thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unlikely/thesaurus/synonyms>.
MLASmart Define. "unlikely thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/unlikely/thesaurus/synonyms>