26 entries under serious topic. ×

16
learned(verb, adjective, obscure, rational, intelligent)
15
erudite(adjective, obscure, thoughtful, learned)
10
studious(adjective, rational, intelligent, thoughtful)
5
lettered(adjective, thoughtful, intellectual, cultured)
4
highbrow(noun, adjective, rational, intelligent)
2
brainy(adjective, bright, rational, intelligent, thoughtful)
2
diligent(thoughtful, reflective)
1
cultivated(knowledgeable, cultured, learned, educated)
1
cultured(knowledgeable, intellectual, learned, educated)
1
reflective
1
thoughtful(rational, intelligent, knowledgeable, reflective)
1
well-informed(adjective, thoughtful, knowledgeable, cultured)
1
well-read(thoughtful, knowledgeable, intellectual, cultured)
0
assiduous(adjective, thoughtful, reflective)
0
attentive(adjective, thoughtful, scholarly, reflective)
0
careful(thoughtful, reflective)
0
cerebral(rational, intelligent, knowledgeable, intellectual)
0
contemplative(thoughtful, reflective)
0
eager(thoughtful, reflective)
0
earnest(thoughtful, reflective)
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APASmart Define. (2015). academic thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/academic/thesaurus/synonyms
ChicagoSmart Define. 2015. "academic thesaurus" https://smartdefine.org/academic/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, academic thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/academic/thesaurus/synonyms>.
MLASmart Define. "academic thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/academic/thesaurus/synonyms>