106 entries under clear topic. ×
| coherent(sound, reasonable, sensible, rational) | |
| consequent(sound, reasonable, sensible, rational) | |
| consequential(adjective, effective, forceful, expressive) | |
| consistent(sound, reasonable, sensible, rational) | |
| definite(adjective, certain, established, unquestionable) | |
| fixed(certain, definite, established, stability) | |
| germane(sound, reasonable, appropriate, sensible) | |
| indubitable(complete, material, certain, true) | |
| lucid(sound, reasonable, sensible, rational) | |
| perceptive(sound, reasonable, sensible, rational) | |
| provable(adjective, true, sure, demonstrable) | |
| ratiocinative(adjective, sound, logical, systematic) | |
| satisfying(adjective, good, reasonable, sensible) | |
| undeniable(material, certain, definite, positive) | |
| undoubted(complete, correct, material, real) | |
| unequivocal(certain, definite, positive, confident) | |
| unquestionable(correct, honest, certain, true) | |
| analytic(sound, reasonable, sensible, rational) | |
| assured(certain, positive, confident, approved) | |
| congruent(sound, reasonable, sensible, rational) |
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| APA | Smart Define. (2016). valid thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/valid/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "valid thesaurus" https://smartdefine.org/valid/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, valid thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/valid/thesaurus/synonyms>. |
| MLA | Smart Define. "valid thesaurus" 31 March 2016. Web. 20 September 2026. <https://smartdefine.org/valid/thesaurus/synonyms> |