54 entries under thoughtful topic. ×
| highbrowed(rational, intelligent, knowledgeable) | |
| penetrating(smart, bright, deep, brainy) | |
| reflective(adjective, sound, sharp, sensible, deep) | |
| serious(adjective, deep, cultured, reflective) | |
| esoteric(adjective, obscure, complex, deep) | |
| shrewd(sound, sharp, sensible, deep, intelligent) | |
| acroamatic(obscure, complex, deep, reflective) | |
| assiduous(serious, reflective) | |
| attentive(serious, reflective) | |
| careful(sound, sharp, sensible, intelligent) | |
| contemplative(sound, sharp, sensible, intelligent) | |
| difficult(obscure, complex, deep, reflective) | |
| eager(serious, reflective) | |
| earnest(serious, reflective) | |
| grubbing(serious, reflective) | |
| hard-working(serious, reflective) | |
| heavy(obscure, complex, deep, reflective) | |
| hermetic(obscure, complex, deep, reflective) | |
| intellective(rational, intelligent, serious, wise) | |
| inventive(smart, bright, rational, intelligent) |
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| APA | Smart Define. (2015). scholarly thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/scholarly/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "scholarly thesaurus" https://smartdefine.org/scholarly/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, scholarly thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/scholarly/thesaurus/synonyms>. |
| MLA | Smart Define. "scholarly thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/scholarly/thesaurus/synonyms> |