4
unbelievably(adverb, ordinarily, incredibly)
3
implausibly
3
improbably
3
incredibly
1
absurdly
1
illogically
1
unlikely(unmistakably, possibly, perceptibly)
0
asininely
0
bizarrely
0
blandly
0
doubtless
0
extraordinarily
0
fancifully
0
fantastically
0
feebly
0
foolishly
0
halfheartedly
0
idiotically
0
impracticably
0
inadequately
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APASmart Define. (2015). plausibly thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/plausibly/thesaurus/antonyms
ChicagoSmart Define. 2015. "plausibly thesaurus" https://smartdefine.org/plausibly/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2015, plausibly thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/plausibly/thesaurus/antonyms>.
MLASmart Define. "plausibly thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/plausibly/thesaurus/antonyms>