- Definitions|2
- Thesaurus|4.1k
- Abbreviations|0
| unquestionable(adjective, definite) | |
| certain(adjective, valid, undoubtable) | |
| definite(adjective, clear, obscure, doubtful, indisputable) | |
| credible | |
| definitive(adjective, false, uncertain) | |
| conclusive | |
| absolute | |
| acknowledged | |
| believable | |
| clear(adjective, doubtful, ambiguous, indisputable, filled) | |
| decisive | |
| evident | |
| incontestable | |
| incontrovertible | |
| irrefutable | |
| most likely | |
| positive | |
| well-documented | |
| categorical(adjective, uncertain, explicit, tentative, unconditional) | |
| indisputable |
For more, visit
Questionable on
Power Thesaurus
| APA | Smart Define. (2015). questionable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/questionable/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "questionable thesaurus" https://smartdefine.org/questionable/thesaurus/antonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, questionable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/questionable/thesaurus/antonyms>. |
| MLA | Smart Define. "questionable thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/questionable/thesaurus/antonyms> |