120 entries under severe topic. ×
| immutable(adjective, set, hard, rough) | |
| ironclad(adjective, set, hard, harsh) | |
| oppressive(adjective, hard, rough, difficult) | |
| painful(adjective, tough, rough, difficult) | |
| pitiless(adjective, harsh, cruel, determined) | |
| sharp(adjective, clear, pleasant, bright) | |
| towering(adjective, unreasonable, noble, extreme) | |
| close(adjective, set, hard, tough) | |
| forbidding(adjective, hard, cool, harsh) | |
| great(adjective, strong, firm, powerful) | |
| strenuous(adjective, tough, difficult, painful) | |
| trying(adjective, tough, difficult, grim) | |
| unmoving(adjective, exact, still, fixed) | |
| Herculean(adjective, tough, difficult, painful) | |
| burdensome(adjective, tough, difficult, painful) | |
| definite(adjective, clear, hard, cool, pleasant) | |
| demanding(adjective, hard, tough, rough) | |
| effortful(tough, difficult, painful, problematic) | |
| incompliant(adjective, hard, tough, firm) | |
| leaden(adjective, dull, slow, heavy) |
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| APA | Smart Define. (2015). stiff thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/stiff/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "stiff thesaurus" https://smartdefine.org/stiff/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, stiff thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/stiff/thesaurus/synonyms>. |
| MLA | Smart Define. "stiff thesaurus" 24 December 2015. Web. 25 September 2026. <https://smartdefine.org/stiff/thesaurus/synonyms> |