97 entries under thoughtful topic. ×
| industrious(practical, controlled, orderly, efficient) | |
| informed(deep, reflective) | |
| insightful(deep, reflective) | |
| knowing(alert, deep, perceptive, reflective) | |
| knowledgeable(deep, reflective) | |
| lettered | |
| orphic(deep, reflective) | |
| penetrating(deep, reflective) | |
| prayerful(adjective, passionate, ardent, sincere) | |
| sagacious(deep, reflective) | |
| secret(deep, reflective) | |
| sedulous(practical, controlled, orderly, efficient) | |
| skilled(deep, reflective) | |
| subtle(quiet, gentle, restrained, deep) | |
| well-informed | |
| well-read | |
| withdrawn(thinking, meditative) |
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| APA | Smart Define. (2016). serious thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/serious/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "serious thesaurus" https://smartdefine.org/serious/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2016, serious thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/serious/thesaurus/synonyms>. |
| MLA | Smart Define. "serious thesaurus" 24 February 2016. Web. 29 September 2026. <https://smartdefine.org/serious/thesaurus/synonyms> |