57 entries under knowledgeable topic. ×

10
learned(adjective, rational, intelligent, serious, refined)
8
brainy(adjective, smart, bright, rational, intelligent)
8
scholarly(adjective, smart, bright, polite, rational)
7
cultured(adjective, refined, intellectual, learned)
7
highbrowed(adjective, rational, intelligent, thoughtful)
7
sage(noun, smart, bright, intellectual)
5
cultivated(adjective, polite, sophisticated, refined)
5
thoughtful(adjective, rational, intelligent, thoughts)
4
educated(adjective, polite, sophisticated, refined)
4
literate(adjective, polite, sophisticated, refined)
2
expert(noun, cultured, educated, erudite)
2
lettered(adjective, polite, sophisticated, refined)
2
logical(adjective, rational, intelligent, intellectual)
2
rational(adjective, smart, bright, intelligent, thoughtful)
2
skilled(cultured, educated, erudite, enlightened)
2
studious(adjective, rational, intelligent, thoughtful, serious)
2
well-read(adjective, intellectual, cultured, learned)
1
abstruse(obscure, cultured, educated, erudite)
1
accomplished(experienced, cultured, educated, enlightened)
1
conversant(cultured, educated, erudite, enlightened)
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APASmart Define. (2015). highbrow thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/highbrow/thesaurus/synonyms
ChicagoSmart Define. 2015. "highbrow thesaurus" https://smartdefine.org/highbrow/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, highbrow thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/highbrow/thesaurus/synonyms>.
MLASmart Define. "highbrow thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/highbrow/thesaurus/synonyms>