110 entries under rational topic. ×

23
intellectual(adjective, sound, reasonable, smart, sensible)
18
mental(adjective, mind, smart, intelligent)
17
cognitive(adjective, sound, reasonable, sensible)
14
intelligent(adjective, sound, reasonable, smart, sensible)
12
psychological(adjective, mind, intelligent, intellect)
9
psychic(adjective, intellectual, supernatural, mental)
8
psychical(adjective, intellect, emotional, reasoning)
8
brainy(adjective, reasonable, intelligent, thoughtful)
7
highbrow(adjective, informal, intelligent, thoughtful)
7
spiritual(adjective, intellect, emotional, intellectual)
6
subjective(adjective, reasonable, intelligent, thoughtful)
5
reasoning(adjective, sound, reasonable, sensible)
5
ruminative(adjective, reasonable, thoughtful, sober)
5
thinking(adjective, sound, reasonable, keen, sensible)
5
thoughtful(adjective, sound, reasonable, sensible)
4
erudite(adjective, serious, wise, intellectual)
4
highbrowed(intelligent, thoughtful, knowledgeable)
3
conceptual(adjective, psychological)
3
deep(adjective, reasonable, keen, thoughtful)
3
philosophic(adjective, sound, reasonable, keen, sensible)
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APASmart Define. (2015). cerebral thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/cerebral/thesaurus/synonyms
ChicagoSmart Define. 2015. "cerebral thesaurus" https://smartdefine.org/cerebral/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, cerebral thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/cerebral/thesaurus/synonyms>.
MLASmart Define. "cerebral thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/cerebral/thesaurus/synonyms>