120 entries under severe topic. ×
| stringent(adjective, hard, rough, difficult) | |
| unconscionable(adjective, big, usual, unreasonable) | |
| vigorous(adjective, strong, pleasant, solid) | |
| exacting(adjective, hard, tough, rough) | |
| heavy(adjective, set, hard, tough) | |
| immoderate(adjective, fancy, unreasonable, extreme) | |
| rough(adjective, hard, difficult, harsh) | |
| uphill(adjective, tough, difficult, grim) | |
| drastic(adjective, hard, rough, harsh) | |
| labored(adjective, tough, difficult, unusual) | |
| undue(adjective, unreasonable, extreme, extravagant) | |
| brisk(adjective, clear, cool, pleasant) | |
| exact(adjective, correct, harsh, solid) | |
| forceful(adjective, strong, great, firm) | |
| formidable(adjective, great, tough, difficult) | |
| toilsome(adjective, tough, difficult, painful) | |
| challenging(tough, painful, demanding, problematic) | |
| dull(adjective, moderate, low, slow) | |
| flinty(adjective, strong, hard, harsh) | |
| grim(adjective, tough, harsh, cruel) |
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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> |