96 entries under strict topic. ×
| adamant(adjective, hard, rough, firm, harsh) | |
| severe(adjective, hard, tough, rough, firm) | |
| austere(adjective, hard, severe, rough, difficult) | |
| harsh(adjective, upset, hard, severe, rough) | |
| powerful(adjective, strong, great, severe, harsh) | |
| inelastic(adjective, hard, tough, firm, solid) | |
| dear(adjective, fancy, difficult, harsh, informal) | |
| cold(adjective, hard, severe, harsh, careless) | |
| rigorous(adjective, hard, severe, rough, difficult) | |
| stern(adjective, hard, severe, rough, firm) | |
| adamantine(adjective, firm, determined, resolute, rigid) | |
| cruel(adjective, hard, severe, rough, harsh) | |
| hard-nosed(adjective, hard, severe, rough, firm) | |
| intractable(adjective, hard, tough, rough, firm) | |
| difficult(adjective, hard, tough, severe, rough) | |
| dogged(adjective, set, harsh, cruel, determined) | |
| extreme(adjective, severe, harsh, extraordinary, cruel) | |
| hidebound(adjective, close, firm, restraint, determined) | |
| steely(adjective, set, hard, firm, dead) | |
| unswayable(adjective, tough, firm, determined, resolute) |
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| APA | Smart Define. (2015). stiff thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/stiff/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "stiff thesaurus" https://smartdefine.org/stiff/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, stiff thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/stiff/thesaurus/synonyms>. |
| MLA | Smart Define. "stiff thesaurus" 24 December 2015. Web. 24 September 2026. <https://smartdefine.org/stiff/thesaurus/synonyms> |