89 entries under rational topic. ×

2
psychical(adjective, intellect, intellectual, supernatural)
2
reasoning(adjective, reasonable, keen, heavy)
2
studious(adjective, reasonable, intelligent, thoughtful)
1
absorbed(adjective, reasonable, keen, deep)
1
analytical(adjective, reasonable, keen, deep)
1
cogitative(adjective, reasonable, keen, deep)
1
contemplative(adjective, reasonable, keen, deep)
1
deliberative(adjective, reasonable, keen, deep)
1
engrossed(adjective, reasonable, keen, deep)
1
imaginative(smart, bright, heavy, intellectual)
1
intellective(intelligent, thoughtful, serious, wise)
1
intent(adjective, reasonable, keen, deep)
1
inventive(smart, bright, intelligent, brilliant)
1
meditative(adjective, reasonable, keen, deep)
1
melancholy(adjective, reasonable, keen, deep)
1
museful(adjective, reasonable, keen, deep)
1
musing(adjective, reasonable, keen, deep)
1
pensive(adjective, reasonable, keen, deep)
1
phrenic(heavy, intelligent, thoughtful, knowledgeable)
1
pondering(adjective, reasonable, keen, deep)
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APASmart Define. (2016). brainy thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/brainy/thesaurus/synonyms
ChicagoSmart Define. 2016. "brainy thesaurus" https://smartdefine.org/brainy/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, brainy thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/brainy/thesaurus/synonyms>.
MLASmart Define. "brainy thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/brainy/thesaurus/synonyms>