40 entries under adjective topic. ×
| unlikely(adverb, reasonable, unmistakably, possibly) | |
| doubtful | |
| eye-opening | |
| implausible(reasonable, likely, unlikely, plausible) | |
| impossible | |
| improbable | |
| inconceivable(reasonable, imaginable) | |
| incredible | |
| outside(slight, slim, middle) | |
| unbelievable | |
| dubious(clear, honest) | |
| fantastic | |
| farfetched | |
| fishy(doubtful, suspicious) | |
| flimsy | |
| remote(unlikely, improbable) | |
| unthinkable | |
| slight(important, large) | |
| uncertain | |
| dissimilar |
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| APA | Smart Define. (2016). likely thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/likely/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "likely thesaurus" https://smartdefine.org/likely/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, likely thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/likely/thesaurus/antonyms>. |
| MLA | Smart Define. "likely thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/likely/thesaurus/antonyms> |