100 entries under restrained topic. ×
| down-to-earth(adjective, calm, tough, plain) | |
| hard-boiled(adjective, calm, strong, hard, tough) | |
| inhibited(adjective, calm, sensible, dark) | |
| levelheaded(adjective, calm, reasonable, sensible, dark) | |
| low-key(adjective, calm, quiet, gentle, sensible) | |
| plain(adjective, calm, open, tough, honest) | |
| repressed(adjective, calm, quiet, gentle, relaxed) | |
| soft(adjective, calm, quiet, gentle, sensible) | |
| toned down(expression, adjective, calm, quiet, gentle) | |
| unexcited(adjective, calm, sensible, dark) | |
| unimpassioned(adjective, calm, tough, dark) | |
| abnegating(adjective, calm, sensible, dark) | |
| callous(adjective, calm, subdued, impassive) | |
| casual(adjective, calm, subdued, impassive) | |
| cold fish(expression, adjective, calm, subdued) | |
| constrained(adjective, calm, sensible, dark) | |
| domestic(quiet, gentle) | |
| domesticated(adjective, quiet, gentle, sober) | |
| down in the mouth(expression, idiom, quiet, gentle) | |
| easy-going(adjective, calm, subdued, impassive) |
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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> |