- Definitions|2
- Thesaurus|1.2k
- Abbreviations|0
75 entries under certain topic. ×
| sure(adjective, clear, complete, reliable) | |
| reliable(adjective, clear, certainty, flawless) | |
| unfailing(adjective, flawless, reliable, trustworthy) | |
| certain(adjective, reliable, valid, dependable) | |
| unerring(adjective, clear, precise, sure) | |
| dependable(adjective, flawless, reliable, trustworthy) | |
| inerrant(adjective, complete, sure, valid) | |
| secure(verb, adjective) | |
| absolute | |
| accurate(adjective, perfect, precise, flawless) | |
| positive(adjective, clear, valid, dependable) | |
| necessary(adjective, inevitable) | |
| sure-fire(adjective, informal, flawless, dependable) | |
| bound(certainty, unquestionable, undisputable) | |
| incontrovertible(adjective, clear, valid, dependable) | |
| surefire(adjective, reliable, trustworthy, dependable) | |
| unquestionable(adjective, dependable, undisputable, unerring) | |
| assured(unquestionable, undisputable, inevitable) | |
| constant(reliable, trustworthy, unquestionable, undisputable) | |
| definite(adjective, clear, valid, unquestionable) |
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| APA | Smart Define. (2015). infallible thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/infallible/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "infallible thesaurus" https://smartdefine.org/infallible/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, infallible thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/infallible/thesaurus/synonyms>. |
| MLA | Smart Define. "infallible thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/infallible/thesaurus/synonyms> |