24 entries under serious topic. ×

18
scholarly(adjective, knowledge, smart, familiar, polite)
17
erudite(adjective, knowledge, smart, familiar, polite)
16
learned(adjective, knowledge, familiar, intelligent, thoughtful)
9
well-read(adjective, familiar, intelligent, thoughtful)
4
academic(adjective, thoughtful, intellectual, cultured)
4
well-informed(adjective, familiar, experienced, cultured)
3
studious(adjective, thoughtful, knowledgeable, attentive)
2
bookish(adjective, knowledge, thoughtful, knowledgeable)
2
brainy(adjective, smart, familiar, intelligent, brilliant)
2
intellectual(adjective, thoughtful, cultured, educated)
0
assiduous(thoughtful, reflective)
0
attentive(thoughtful, reflective)
0
careful(thoughtful, reflective)
0
contemplative(thoughtful, reflective)
0
diligent(thoughtful, reflective)
0
eager(thoughtful, reflective)
0
earnest(thoughtful, reflective)
0
grubbing(thoughtful, reflective)
0
hard-working(thoughtful, reflective)
0
industrious(thoughtful, reflective)
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APASmart Define. (2015). lettered thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/lettered/thesaurus/synonyms
ChicagoSmart Define. 2015. "lettered thesaurus" https://smartdefine.org/lettered/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, lettered thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/lettered/thesaurus/synonyms>.
MLASmart Define. "lettered thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/lettered/thesaurus/synonyms>