- Definitions|2
- Thesaurus|4.6k
- Abbreviations|0
| sure(adjective, good, set, clear, understanding) | |
| positive(adjective, good, set, clear, strong) | |
| definite(adjective, good, clear, strong, complete) | |
| conviction | |
| unquestionable(adjective, clear, correct, flat, honest) | |
| indisputable(adjective, certain, true, ideal, unequivocal) | |
| absolute(adjective, clear, strong, complete, correct) | |
| confident(adjective, set, clear, strong, easy) | |
| unequivocal(adjective, definite, absolute, positive, ideal) | |
| undeniable(adjective, certain, true, definite, absolute) | |
| certitude | |
| fact | |
| confidence | |
| sureness | |
| incontestable(adjective, certain, true, ideal, unequivocal) | |
| incontrovertible(adjective, certain, true, ideal, valid) | |
| assuredness | |
| indubitable(adjective, clear, certain, true, real) | |
| reliance | |
| clear(adjective, complete, flat, firm, total) |
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| APA | Smart Define. (2016). certain thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/certain/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "certain thesaurus" https://smartdefine.org/certain/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, certain thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/certain/thesaurus/synonyms>. |
| MLA | Smart Define. "certain thesaurus" 31 March 2016. Web. 21 September 2026. <https://smartdefine.org/certain/thesaurus/synonyms> |