10
plausible(adjective, reasonable, unreasonable, believable)
6
likely(adjective, reasonable, unlikely, plausible)
5
believable(adjective, reasonable, unreasonable, unbelievable, plausible)
5
credible(adjective, reasonable, unsound, unbelievable, believable)
5
reasonable(adjective, senseless, irrational, unsound, plausible)
4
conceivable
4
most likely
3
possible(adjective, reasonable, plausible)
3
feasible(adjective, improper, impossible)
3
imaginable
3
probable
3
prudent
2
convincing(adjective, weak, reasonable, plausible, unconvincing)
2
achievable
2
arguable
2
attainable
2
creditable
2
glib
2
pat
2
possibly(adjective, reasonable, plausible)
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APASmart Define. (2015). implausible thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/implausible/thesaurus/antonyms
ChicagoSmart Define. 2015. "implausible thesaurus" https://smartdefine.org/implausible/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, implausible thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/implausible/thesaurus/antonyms>.
MLASmart Define. "implausible thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/implausible/thesaurus/antonyms>