Synonyms|352Antonyms|121|Broader|4Narrower|7Related|1.4k

45 entries under improbable topic. ×

5
problematic(adjective, likely, unlikely, unbelievable)
4
beyond belief(expression, adjective, idiom, extraordinary, amazing)
4
untenable(adjective, irrational, unbelievable, unreasoned)
3
dubitable
3
obscure(adjective, likely, unlikely, unbelievable)
3
outlandish(adjective, hard, difficult, extraordinary, amazing)
3
puzzling(adjective, likely, unlikely, unbelievable)
3
slight(adjective, flat, poor, thin, inadequate)
2
faint(doubtful, dubious)
2
strange(adjective, extraordinary, fantastic, doubtful, dubious)
1
far out(expression, adjective, likely, unlikely, unbelievable)
1
incogitable(extraordinary, strange, amazing, unbelievable, incredible)
1
insupposable(extraordinary, strange, unbelievable, unthinkable)
1
not likely(expression, adjective, doubtful, dubious, unlikely)
1
outside chance(expression, doubtful, dubious, unlikely)
1
phony(extraordinary, strange, amazing, unbelievable, incredible)
1
rare(extraordinary, strange, doubtful, dubious, unlikely)
1
reachy(adjective, extraordinary, strange, likely, unlikely)
1
unheard-of(extraordinary, strange, doubtful, dubious, unbelievable)
0
contrary(doubtful, dubious)
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ChicagoSmart Define. 2015. "implausible thesaurus" https://smartdefine.org/implausible/thesaurus/synonyms (accessed September 22, 2026).
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