75 entries under reasonable topic. ×
| cool(adjective, sound, sensible, rational) | |
| deductive(sound, sensible, reasoning, intellectual) | |
| deliberative(adjective, keen, deep, rational) | |
| discerning(adjective, sound, keen, sensible) | |
| earnest(adjective, keen, deep, rational) | |
| engrossed(adjective, keen, deep, rational) | |
| farsighted(adjective, keen, deep, rational) | |
| grave(adjective, keen, deep, rational) | |
| impartial(sound, sensible, reasoning, intellectual) | |
| intent(adjective, keen, deep, rational) | |
| judicious(adjective, sound, sensible, rational) | |
| keen(adjective, deep, rational, thoughtful) | |
| levelheaded(adjective, sound, sensible, rational) | |
| lost in thought(expression, adjective, idiom, sober) | |
| meditative(adjective, keen, deep, rational) | |
| melancholy(adjective, keen, deep, rational) | |
| museful(adjective, keen, deep, rational) | |
| musing(adjective, keen, deep, rational) | |
| normal(sound, sensible, reasoning, intellectual) | |
| objective(sound, sensible, reasoning, intellectual) |
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| APA | Smart Define. (2015). cerebral thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/cerebral/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "cerebral thesaurus" https://smartdefine.org/cerebral/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, cerebral thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/cerebral/thesaurus/synonyms>. |
| MLA | Smart Define. "cerebral thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/cerebral/thesaurus/synonyms> |