97 entries under thoughtful topic. ×
| engrossed(adjective, reasonable, keen, deep, rational) | |
| learned(deep, cultured, reflective) | |
| lost in thought(expression, adjective, idiom, reasonable) | |
| mysterious(deep, reflective) | |
| philosophical(deep, grand, esteemed, reflective) | |
| rapt(adjective, reasonable, keen, deep, rational) | |
| reasoning(adjective, reasonable, keen, deep, rational) | |
| studious(adjective, reasonable, keen, deep) | |
| wise(adjective, reasonable, keen, heavy, deep) | |
| occult(deep, reflective) | |
| abstracted(thinking, meditative) | |
| academic(cultured, reflective) | |
| acroamatic(deep, reflective) | |
| bookish(cultured, reflective) | |
| cogitating | |
| dreamy(thinking, meditative) | |
| enlightened(deep, reflective) | |
| grubbing | |
| hard-working | |
| hermetic(deep, reflective) |
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Serious on
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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> |