120 entries under sober topic. ×
| plausible(adjective, clear, sound, reasonable, sensible) | |
| ratiocinative(adjective, clear, sound, reasonable, reason) | |
| compos mentis(expression, adjective, idiom, sound, reasonable) | |
| discreet(adjective, calm, understanding, reasonable, keen) | |
| of sound mind(expression, adjective, idiom, sensible, healthy) | |
| together(adjective, calm, good, sound, reasonable) | |
| cerebral(adjective, sound, reasonable, sensible, intelligent) | |
| down-to-earth(adjective, calm, hard, sound, reasonable) | |
| thoughtful(adjective, good, sound, reasonable, sensible) | |
| all there(expression, adjective, idiom, calm, good) | |
| analytical(adjective, clear, sound, reasonable, reason) | |
| brainy(adjective, understanding, reasonable, keen, sharp) | |
| consequent(adjective, good, clear, sound, reasonable) | |
| credible(adjective, sound, reasonable, sensible, solid) | |
| discerning(adjective, clear, understanding, sound, reasonable) | |
| informed(adjective, reasonable, sensible, stable, intelligent) | |
| justifiable(adjective, clear, sound, reasonable, honest) | |
| levelheaded(adjective, calm, good, quiet, hard) | |
| sapient(adjective, sound, reason, sensible, proper) | |
| believable(adjective, sound, reasonable, honest, sensible) |
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| APA | Smart Define. (2016). rational thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/rational/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "rational thesaurus" https://smartdefine.org/rational/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, rational thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/rational/thesaurus/synonyms>. |
| MLA | Smart Define. "rational thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/rational/thesaurus/synonyms> |