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

43 entries under implausible topic. ×

2
unheard-of(adjective, obscure, extraordinary, strange, doubtful)
2
weak(extraordinary, strange, doubtful, unbelievable)
1
belief(extraordinary, strange, unbelievable, unthinkable)
1
beyond reason(expression, extraordinary, strange, unbelievable)
1
iffy(uncertain, doubtful, shaky, unsure)
1
imcomprehensible(extraordinary, strange, unbelievable, unthinkable)
1
incogitable(extraordinary, strange, unbelievable, unthinkable)
1
insupposable(extraordinary, strange, unbelievable, unthinkable)
1
mind-boggling(extraordinary, strange, fantastic, unbelievable)
1
not likely(expression, adjective, idiom, doubtful, dubious)
1
outside chance(expression, adjective, doubtful, dubious)
1
phony(extraordinary, strange, unbelievable, unthinkable)
1
reachy(extraordinary, strange, unbelievable, idealistic)
1
staggering(extraordinary, strange, unbelievable, unthinkable)
1
thin(adjective, light, extraordinary, strange, exceptional)
1
uncertain(adjective, open, doubtful, dubious, rare)
1
unheard of(adjective, light, thin, doubtful, rare)
1
unknowable(extraordinary, strange, unbelievable, unthinkable)
1
unsubstantial(extraordinary, strange, doubtful, unbelievable)
0
hundred-to-one
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APASmart Define. (2015). unlikely thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/unlikely/thesaurus/synonyms
ChicagoSmart Define. 2015. "unlikely thesaurus" https://smartdefine.org/unlikely/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, unlikely thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/unlikely/thesaurus/synonyms>.
MLASmart Define. "unlikely thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/unlikely/thesaurus/synonyms>