11
plausible(adjective, reasonable, unreasonable, likely, believable)
9
likely
7
possible(adjective, unreasonable, likely, unlikely)
6
believable(adjective, unreasonable, likely, unbelievable)
6
conceivable
6
probable(adjective, happen, likely, unlikely)
5
realist
4
credible(adjective, unsound, unbelievable, believable)
4
ostensible(adjective, obscure, likely, supposed, alleged)
3
most likely
3
liable
2
feasible
2
verisimilar
1
imaginable(adjective, possible, believable)
1
cognitive
1
logical(adjective, reasonable, obscure, probable, illogical)
1
normal
1
ordinary(adjective, likely)
1
practicable
1
predictable(adjective, unpredictable)
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APASmart Define. (2015). improbable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/improbable/thesaurus/antonyms
ChicagoSmart Define. 2015. "improbable thesaurus" https://smartdefine.org/improbable/thesaurus/antonyms (accessed September 20, 2026).
HarvardSmart Define 2015, improbable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/improbable/thesaurus/antonyms>.
MLASmart Define. "improbable thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/improbable/thesaurus/antonyms>