| certain(adjective, honest, true, straight, definite) | |
| determined(verb, evinced, proved, ascertained) | |
| insured(verb, adjective, guaranteed) | |
| professed(verb, affirmed) | |
| secured(verb, adjective, guaranteed) | |
| stated(verb, affirmed, evinced) | |
| sure(adjective, test, expert, reliable) | |
| tried(adjective, test, expert, reliable) | |
| averred(verb, affirmed) | |
| certifiable | |
| deposed(verb, adjective, feigned, stated, acknowledged) | |
| exhibited(verb, adjective, evinced, evidential) | |
| promised(verb, adjective, guaranteed, affirmed) | |
| recognized(verb, adjective, accepted, legal, permitted) | |
| tested(adjective, test, expert, reliable) | |
| true | |
| underwritten(verb, approved) | |
| accredited(verb, adjective, proper, definite, qualified) | |
| agreed(verb, adjective, accepted, permitted, official) | |
| asserted(verb, affirmed) |
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| APA | Smart Define. (2015). certified thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/certified/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "certified thesaurus" https://smartdefine.org/certified/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, certified thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/certified/thesaurus/synonyms>. |
| MLA | Smart Define. "certified thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/certified/thesaurus/synonyms> |