| buttressed | |
| cantankerous(adjective, persistent, obstinate, insistent, dogged) | |
| categorically true | |
| changeless(adjective, certain, limited, definite, fixed) | |
| cinched(adjective, set, solid, certain, sure) | |
| circumscribed(adjective, certain, limited, definite, inflexible) | |
| circumstantiated | |
| clear-cut(adjective, set, solid, certain, sure) | |
| common(usual, normal, accepted, traditional, habitual) | |
| conceded | |
| concluded(verb, adjective, firm, determined, usual) | |
| confirmatory | |
| confirms | |
| congenital | |
| connoted(verb, evinced) | |
| continuous(adjective, steady, regular, persistent, even) | |
| contrary(adjective, persistent, obstinate, insistent, dogged) | |
| contumacious(adjective, persistent, obstinate, insistent, dogged) | |
| conventional(adjective, proper, common, usual, regular) | |
| corroborate |
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| APA | Smart Define. (2016). confirmed thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/confirmed/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "confirmed thesaurus" https://smartdefine.org/confirmed/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, confirmed thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/confirmed/thesaurus/synonyms>. |
| MLA | Smart Define. "confirmed thesaurus" 26 February 2016. Web. 23 September 2026. <https://smartdefine.org/confirmed/thesaurus/synonyms> |