1
insupposable(extraordinary, strange, unbelievable, improbable, unthinkable)
1
ironic(adjective, sarcastic)
1
lame(adjective, weak, flat, poor, thin)
1
lamebrained(extraordinary, amazing, incredible)
1
likely
1
mad
1
makeshift(adjective, unpredictable, fickle, variable, undependable)
1
meagre
1
meaningless(adjective, absurd)
1
mind-boggling(adjective, extraordinary, strange, fantastic, amazing)
1
more than doubtful(expression, idiom)
1
negligible
1
not deserving belief(expression, idiom)
1
not likely(expression, adjective, doubtful, dubious, unlikely)
1
open to suspicion(expression, idiom)
1
outside
1
outside chance(expression, doubtful, dubious, unlikely, improbable)
1
paltry
1
paradoxical(adjective, absurd)
1
passing belief
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APASmart Define. (2015). implausible thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/implausible/thesaurus/synonyms
ChicagoSmart Define. 2015. "implausible thesaurus" https://smartdefine.org/implausible/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, implausible thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/implausible/thesaurus/synonyms>.
MLASmart Define. "implausible thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/implausible/thesaurus/synonyms>