- Definitions|0
- Thesaurus|343
- Abbreviations|0
60 entries under unquestionable topic. ×
| certain(adjective, sure, reliable, trustworthy) | |
| sure(adjective, solid, certain, definite, constant) | |
| infallible(adjective, certain, reliable, trustworthy, dependable) | |
| unfailing(adjective, certain, reliable, trustworthy) | |
| assured(certain, sure, confident, anguished) | |
| firm(certain, undisputable, locked, warranted) | |
| incontrovertible(adjective, certain, undeniable, undisputable) | |
| indubitable(adjective, solid, certain, definite, sure) | |
| steadfast(certain, reliable, trustworthy, undisputable) | |
| steady(certain, undisputable) | |
| accurate(adjective, certain, established, undisputable) | |
| bound to be(expression, idiom, certain, undisputable) | |
| decided(adjective, set, solid, certain, definite) | |
| definite(adjective, solid, certain, sure, confident) | |
| fixed(adjective, set, solid, certain, definite) | |
| guaranteed(adjective, set, firm, solid, certain) | |
| incontestable(certain, established, accurate, undeniable) | |
| inerrant(certain, undisputable) | |
| inevitable(adjective, certain, undisputable) | |
| never-failing(certain, reliable, trustworthy, boundless) |
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| APA | Smart Define. (2015). surefire thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/surefire/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "surefire thesaurus" https://smartdefine.org/surefire/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, surefire thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/surefire/thesaurus/synonyms>. |
| MLA | Smart Define. "surefire thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/surefire/thesaurus/synonyms> |