116 entries under serious topic. ×
| hard-boiled(adjective, calm, strong, hard, tough) | |
| hard-line(adjective, strong, hard, tough, rough) | |
| hideous(adjective, appearance, terrible, extreme) | |
| important(adjective, tough, big, heavy, deep) | |
| staid(adjective, calm, quiet, set, reasonable) | |
| stiff-necked(adjective, strong, hard, tough, harsh) | |
| decisive(alert, perceptive, authoritative, lucid) | |
| dull(adjective, simple, pure, basic) | |
| essential(adjective, hard, cold, austere) | |
| frowning(adjective, strong, hard, tough, harsh) | |
| hardheaded(adjective, strong, hard, tough, harsh) | |
| hazardous(adjective, awful, heavy, terrible, wicked) | |
| mortified(adjective, strong, hard, tough, harsh) | |
| no-nonsense(adjective, calm, quiet, set, tough) | |
| sobersided | |
| somber(adjective, calm, quiet, appearance, reasonable) | |
| subdued(adjective, calm, quiet, reasonable, sensible) | |
| sudden | |
| urgent(adjective, hard, tough, difficult, heavy) | |
| abnegating(adjective, calm, quiet, reasonable, sensible) |
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| APA | Smart Define. (2016). severe thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/severe/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "severe thesaurus" https://smartdefine.org/severe/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, severe thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/severe/thesaurus/synonyms>. |
| MLA | Smart Define. "severe thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/severe/thesaurus/synonyms> |