120 entries under severe topic. ×
| firm(noun, adjective, feature, state, characteristic) | |
| rigid(adjective, feature, state, characteristic, strong) | |
| hard(adjective, feature, state, characteristic, hard) | |
| strong(adjective, strong, strain, firm) | |
| tight(adjective, close, strong, hard, secure) | |
| inflexible(adjective, hard, tough, rough) | |
| inexorable(adjective, tough, firm, harsh) | |
| uncompromising(adjective, hard, tough, rough) | |
| resolute(adjective, strong, hard, tough) | |
| unbending(adjective, hard, correct, rough) | |
| intransigent(adjective, determined, resolute, obstinate) | |
| obdurate(adjective, hard, tough, rough) | |
| unrelenting(adjective, tough, firm, harsh) | |
| relentless(adjective, tough, firm, harsh) | |
| formal(adjective, characteristic, tough, correct) | |
| set(adjective, hard, secure, tough) | |
| tough(adjective, strong, hard, rough) | |
| steep(adjective, fancy, big, crazy) | |
| austere(adjective, hard, rough, difficult) | |
| harsh(adjective, upset, hard, rough) |
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| APA | Smart Define. (2015). stiff thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/stiff/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "stiff thesaurus" https://smartdefine.org/stiff/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, stiff thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/stiff/thesaurus/synonyms>. |
| MLA | Smart Define. "stiff thesaurus" 24 December 2015. Web. 22 September 2026. <https://smartdefine.org/stiff/thesaurus/synonyms> |