58 entries under thoughtful topic. ×

2
abstruse(adjective, obscure, deep, precise)
2
cerebral(rational, intelligent, serious, wise)
2
insightful(sound, sharp, familiar, deep, intelligent)
2
rational(adjective, intelligent, wise, moral)
2
recondite(adjective, deep, knowledgeable, cultured)
1
subtle(deep, reflective)
1
esoteric(adjective, deep, knowledgeable, cultured)
1
serious(deep, cultured, reflective)
0
acroamatic(deep, reflective)
0
assiduous(serious, reflective)
0
attentive(serious, reflective)
0
careful(sound, sharp, serious, wise)
0
contemplative(sound, sharp, intelligent, serious)
0
difficult(deep, reflective)
0
diligent(serious, reflective)
0
eager(serious, reflective)
0
earnest(serious, reflective)
0
grubbing(serious, reflective)
0
hard-working(serious, reflective)
0
heavy(deep, reflective)
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APASmart Define. (2015). learned thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/learned/thesaurus/synonyms
ChicagoSmart Define. 2015. "learned thesaurus" https://smartdefine.org/learned/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, learned thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/learned/thesaurus/synonyms>.
MLASmart Define. "learned thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/learned/thesaurus/synonyms>