| absoluteness(noun, truth) | |
| actuality(noun, action, understanding, knowledge, experience) | |
| authenticity(noun, truth) | |
| cert | |
| certification(noun, sanction, evidence, authorization, witness) | |
| cinch | |
| corroboration(noun, support, check, information, mark) | |
| definiteness(noun, truth) | |
| legibility | |
| precision | |
| reality(noun, action, understanding, knowledge, experience) | |
| reliability | |
| transparency | |
| understanding(noun, action, knowledge, agreement, experience) | |
| verity(noun, truth) | |
| confidence(noun, assurance, certainty, undoubtedness) | |
| data(noun, information, evidence, support, action) | |
| guarantee(noun, agreement, arrangement, record, deal) | |
| impervious(adjective, characteristic, calm, resist, restrained) | |
| positiveness(noun, confidence, assurance, certainty, undoubtedness) |
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| APA | Smart Define. (2015). proof thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/proof/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "proof thesaurus" https://smartdefine.org/proof/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, proof thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/proof/thesaurus/synonyms>. |
| MLA | Smart Define. "proof thesaurus" 22 December 2015. Web. 22 September 2026. <https://smartdefine.org/proof/thesaurus/synonyms> |