85 entries under reflective topic. ×
| grave(adjective, calm, dull, quiet, help) | |
| weighty(adjective, good, dull, hard, great) | |
| earnest(noun, adjective, calm, dull, work) | |
| sober(adjective, calm, dull, quiet, cool) | |
| difficult(adjective, hard, tough, easy, harsh) | |
| profound(adjective, hard, difficult, complex, deep) | |
| heavy(adjective, strong, hard, great, tough) | |
| deep(adjective, keen, important, significant, thoughtful) | |
| thoughtful(adjective, severe, deep, sober, thinking) | |
| intent(adjective, firm, determined, thoughtful, sober) | |
| ruminative(adjective, reasonable, rational, thoughtful, sober) | |
| pensive(adjective, set, keen, unhappy, gloomy) | |
| contemplative(adjective, reasonable, thoughtful, sober, thinking) | |
| meditative(adjective, set, thoughtful, thinking, stern) | |
| careful(adjective, regular, thoughtful, practical, competent) | |
| cogitative(adjective, reasonable, keen, deep, thoughtful) | |
| musing(adjective, reasonable, keen, deep, thoughtful) | |
| reasonable(adjective, calm, keen, sensible, restrained) | |
| wistful(adjective, reasonable, keen, unhappy, gloomy) | |
| abstruse(intense, heavy, deep, fierce, thoughtful) |
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| APA | Smart Define. (2016). serious thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/serious/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "serious thesaurus" https://smartdefine.org/serious/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, serious thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/serious/thesaurus/synonyms>. |
| MLA | Smart Define. "serious thesaurus" 24 February 2016. Web. 24 September 2026. <https://smartdefine.org/serious/thesaurus/synonyms> |