126 entries under sober topic. ×
| quiet(adjective, calm, cool, severe, gentle) | |
| reasonable(adjective, calm, keen, sensible, restrained) | |
| wistful(adjective, reasonable, keen, unhappy, gloomy) | |
| attentive(adjective, reasonable, keen, deep, thoughtful) | |
| brooding(adjective, thoughtful, thinking, grave) | |
| constant(adjective, strong, firm, sensible, pure) | |
| deadpan(adjective, set, tough, severe, honest) | |
| decorous(adjective, calm, cool, modest, shy) | |
| deliberative(adjective, reasonable, keen, deep, rational) | |
| glum(adjective, unhappy, unpleasant, gloomy, miserable) | |
| impassive(adjective, calm, tough, restrained, rational) | |
| 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) | |
| realistic(adjective, calm, tough, sensible, dark) | |
| reflecting(adjective, reasonable, keen, deep, rational) |
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| APA | Smart Define. (2016). serious thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/serious/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "serious thesaurus" https://smartdefine.org/serious/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, serious thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/serious/thesaurus/synonyms>. |
| MLA | Smart Define. "serious thesaurus" 24 February 2016. Web. 27 September 2026. <https://smartdefine.org/serious/thesaurus/synonyms> |