75 entries under reasonable topic. ×
| pensive(adjective, keen, deep, rational) | |
| pondering(adjective, keen, deep, rational) | |
| preoccupied(adjective, keen, deep, rational) | |
| rapt(adjective, keen, deep, rational) | |
| ratiocinative(adjective, sound, sensible, rational) | |
| reasoned(adjective, sound, sensible, rational) | |
| reflecting(adjective, keen, deep, rational) | |
| reflective(adjective, sound, sensible, rational) | |
| retrospective(adjective, keen, deep, rational) | |
| sane(adjective, sound, sensible, rational) | |
| sensible(adjective, sound, rational, intelligent) | |
| serious(adjective, keen, deep, rational) | |
| sober(adjective, sound, sensible, rational) | |
| sound(adjective, sensible, rational, intelligent) | |
| stable(sound, sensible, reasoning, intellectual) | |
| studious(adjective, keen, rational, intelligent) | |
| synthetic(sound, sensible, reasoning, intellectual) | |
| together(adjective, sound, sensible, rational) | |
| well-advised(adjective, sound, sensible, rational) | |
| wise(adjective, sound, sensible, rational) |
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| APA | Smart Define. (2015). cerebral thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/cerebral/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "cerebral thesaurus" https://smartdefine.org/cerebral/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, cerebral thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/cerebral/thesaurus/synonyms>. |
| MLA | Smart Define. "cerebral thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/cerebral/thesaurus/synonyms> |