67 entries under rational topic. ×
| coherent(clear, sound, reasonable, sensible) | |
| commonsense(sound, reasonable) | |
| consequent(clear, sound, reasonable, sensible) | |
| consistent(clear, sound, reasonable, sensible) | |
| germane(clear, sound, reasonable, appropriate, sensible) | |
| lucid(clear, sound, reasonable, sensible) | |
| perceptive(clear, sound, reasonable, sensible) | |
| proven(adjective, good, sound, right, reasonable) | |
| ultimate(adjective, sound, right, reasonable) | |
| unanswerable(adjective, sound, right, reasonable) | |
| uncorrupted(adjective, sound, right, reasonable) | |
| analytic(clear, sound, reasonable, sensible) | |
| clear(adjective, sound, reasonable, firm, sensible) | |
| congruent(clear, sound, reasonable, sensible) | |
| deducible(clear, sound, reasonable, sensible) | |
| defensible(adjective, sound, reasonable, justified) | |
| discerning(clear, sound, reasonable, sensible) | |
| discriminating(clear, sound, reasonable, sensible) | |
| extensional(clear, sound, reasonable, sensible) | |
| inferential(clear, sound, reasonable, sensible) |
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| Chicago | Smart Define. 2016. "valid thesaurus" https://smartdefine.org/valid/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, valid thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/valid/thesaurus/synonyms>. |
| MLA | Smart Define. "valid thesaurus" 31 March 2016. Web. 22 September 2026. <https://smartdefine.org/valid/thesaurus/synonyms> |