77 entries under rational topic. ×

20
cerebral(adjective, sound, reasonable, smart, sensible)
16
mental(adjective, mind, smart, intelligent)
15
brainy(adjective, reasonable, ability, smart, bright)
14
learned(verb, adjective, smart, deep)
10
psychological(adjective, mind, smart, intelligent)
9
spiritual(adjective, intellect, emotional, supernatural)
9
thoughtful(adjective, good, sound, reasonable, smart)
9
wise(adjective, good, sound, reasonable, smart)
8
abstract(adjective, obscure, extraordinary, fantastic)
8
erudite(adjective, deep, intelligent, thoughtful)
7
psychic(adjective, supernatural, mental, spiritual)
7
psychical(adjective, intellect, emotional, reasoning)
7
subjective(adjective, reasonable, keen, smart)
7
reasonable(adjective, good, sound, smart, bright)
7
thinking(adjective, sound, reasonable, keen, smart)
6
knowledgeable(adjective, ability, smart, bright, deep)
6
bright(adjective, smart, intelligent, thoughtful)
6
conceptual(adjective, cerebral, psychological, nonconcrete)
6
highbrowed(adjective, smart, intelligent, knowledgeable)
6
philosophic(adjective, sound, reasonable, sensible)
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APASmart Define. (2016). intellectual thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/intellectual/thesaurus/synonyms
ChicagoSmart Define. 2016. "intellectual thesaurus" https://smartdefine.org/intellectual/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, intellectual thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/intellectual/thesaurus/synonyms>.
MLASmart Define. "intellectual thesaurus" 22 February 2016. Web. 23 September 2026. <https://smartdefine.org/intellectual/thesaurus/synonyms>