244 entries under adjective topic. ×

2
unsound(false, unreasonable, senseless, unpredictable)
2
unworkable
1
apocryphal
1
baseless(poor, unconvincing)
1
contradictory
1
deficient(flat, poor, thin, small)
1
eccentric
1
exaggerated(hard, keen, sharp, difficult)
1
false(poor, thin, unreasonable, senseless)
1
far out(expression, likely, unlikely, unbelievable)
1
fictitious
1
flawed
1
for the birds(expression, idiom, extraordinary, amazing)
1
full of holes(expression, idiom, extraordinary, amazing)
1
hallucinatory(strange, crazy, insane, unpredictable)
1
hollow(poor, thin, false, small)
1
idiotic
1
inconclusive(weak, poor, thin, false)
1
inconsistent
1
indefensible
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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>