13 entries under adjective topic. ×

6
unlikely(adverb, unmistakably, possibly, perceptibly)
4
doubtful(unlikely, hardly, scarcely, illy)
4
implausible(unlikely, hardly, scarcely, illy)
3
faint(unlikely, hardly, scarcely, illy)
3
improbable(unlikely, hardly, scarcely, illy)
3
incredible(unlikely, hardly, scarcely, illy)
3
questionable(unlikely, hardly, scarcely, illy)
3
remote(unlikely, hardly, scarcely, illy)
3
slight(unlikely, hardly, scarcely, illy)
3
unbelievable(unlikely, hardly, scarcely, illy)
3
unconvincing(unlikely, hardly, scarcely, illy)
3
unimaginable(unlikely, hardly, scarcely, illy)
2
uncertain(unmistakably, perceptibly, palpably)
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APASmart Define. (2015). most likely thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/most_likely/thesaurus/antonyms
ChicagoSmart Define. 2015. "most likely thesaurus" https://smartdefine.org/most_likely/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2015, most likely thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/most_likely/thesaurus/antonyms>.
MLASmart Define. "most likely thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/most_likely/thesaurus/antonyms>