85 entries under reflective topic. ×
| assiduous(adjective, thoughtful) | |
| attentive(adjective, reasonable, keen, deep, thoughtful) | |
| brooding(adjective, thoughtful, sober, thinking, grave) | |
| deliberative(adjective, reasonable, keen, deep, rational) | |
| erudite(deep, thoughtful, cultured) | |
| intellectual(adjective, reasonable, keen, deep, thoughtful) | |
| keen(adjective, reasonable, sensible, passionate, deep) | |
| melancholy(adjective, dull, reasonable, keen, unhappy) | |
| museful(adjective, reasonable, keen, deep, rational) | |
| pondering(adjective, reasonable, keen, deep, thoughtful) | |
| preoccupied(adjective, reasonable, keen, deep, thoughtful) | |
| rational(adjective, calm, reasonable, keen, dark) | |
| recondite(intense, heavy, deep, fierce, thoughtful) | |
| reflecting(adjective, reasonable, keen, deep, rational) | |
| sage(deep, thoughtful, grand, esteemed) | |
| scholarly(deep, thoughtful, cultured) | |
| shrewd(deep, thoughtful) | |
| thinking(adjective, reasonable, keen, deep, thoughtful) | |
| absorbed(adjective, reasonable, keen, deep, thoughtful) | |
| analytical(adjective, reasonable, keen, deep, rational) |
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| APA | Smart Define. (2016). serious thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/serious/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "serious thesaurus" https://smartdefine.org/serious/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, serious thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/serious/thesaurus/synonyms>. |
| MLA | Smart Define. "serious thesaurus" 24 February 2016. Web. 26 September 2026. <https://smartdefine.org/serious/thesaurus/synonyms> |