73 entries under thoughtful topic. ×

20
cerebral(adjective, sound, reasonable, smart, sensible)
20
intelligent(adjective, sound, reasonable, ability, smart)
18
rational(adjective, good, sound, reasonable, smart)
15
brainy(adjective, reasonable, ability, smart, bright)
13
scholarly(adjective, smart, bright, deep)
9
wise(adjective, good, sound, reasonable, smart)
8
erudite(adjective, deep, rational, intelligent)
7
profound(adjective, smart, bright, intelligent)
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, rational, intelligent)
6
philosophic(adjective, sound, reasonable, sensible, rational)
6
reasoning(noun, adjective, power, sound, reasonable)
6
sophisticated(adjective, rational, intelligent, experienced)
5
informed(adjective, deep, experienced, knowing)
5
ruminative(adjective, reasonable, rational, intelligent)
4
deep(adjective, good, sound, reasonable, smart)
4
reflective(adjective, sound, reasonable, sensible, deep)
4
speculative(adjective, abstract, theoretical, reflective)
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APASmart Define. (2016). intellectual thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/intellectual/thesaurus/synonyms
ChicagoSmart Define. 2016. "intellectual thesaurus" https://smartdefine.org/intellectual/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, intellectual thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/intellectual/thesaurus/synonyms>.
MLASmart Define. "intellectual thesaurus" 22 February 2016. Web. 26 September 2026. <https://smartdefine.org/intellectual/thesaurus/synonyms>