59 entries under improbable topic. ×

29
improbable(adjective, slight, extraordinary, strange, superb)
18
implausible(adjective, slight, extraordinary, strange, superb)
16
doubtful(adjective, slight, uncertain, shaky, dubious)
14
remote(adjective, slight, doubtful, dubious)
13
incredible(adjective, extraordinary, strange, superb, fantastic)
11
dubious(adjective, open, slight, uncertain, doubtful)
10
unbelievable(adjective, obscure, extraordinary, strange, superb)
10
far-fetched(adjective, hard, strange, uncertain, fantastic)
9
questionable(adjective, open, uncertain, doubtful, shaky)
8
fishy(adjective, uncertain, doubtful, shaky, dubious)
7
fantastic(adjective, extraordinary, strange, superb, amazing)
7
farfetched(adjective, unbelievable, unbelieveable)
6
absurd(adjective, strange, crazy, unreasonable, fantastic)
6
slight(adjective, doubtful, remote, dubious)
5
impossible(adjective, extraordinary, unusual, strange, unreasonable)
5
suspect(adjective, open, obscure, uncertain, doubtful)
4
dubitable(adjective, uncertain, doubtful, shaky, unsure)
4
faint(adjective, slight, doubtful, remote, dubious)
4
unrealistic(adjective, strange, fantastic, doubtful, dubious)
3
flimsy(adjective, light, thin, exceptional, short)
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APASmart Define. (2015). unlikely thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/unlikely/thesaurus/synonyms
ChicagoSmart Define. 2015. "unlikely thesaurus" https://smartdefine.org/unlikely/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, unlikely thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/unlikely/thesaurus/synonyms>.
MLASmart Define. "unlikely thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/unlikely/thesaurus/synonyms>