96 entries under strict topic. ×
| arduous(adjective, hard, tough, severe, rough) | |
| stringent(adjective, hard, severe, rough, difficult) | |
| exacting(adjective, hard, tough, severe, rough) | |
| heavy(adjective, set, hard, tough, severe) | |
| prudish(adjective, informal, shy, particular) | |
| rough(adjective, hard, severe, difficult, harsh) | |
| unchangeable(adjective, set, hard, resolute, rigid) | |
| drastic(adjective, hard, severe, rough, harsh) | |
| indomitable(adjective, hard, rigid, inflexible) | |
| staunch(adjective, set, strong, hard, firm) | |
| exact(adjective, correct, severe, harsh, solid) | |
| forceful(adjective, strong, great, severe, firm) | |
| iron(adjective, firm, resolute, rigid, inflexible) | |
| flinty(adjective, strong, hard, severe, harsh) | |
| grim(adjective, tough, severe, harsh, cruel) | |
| immutable(adjective, set, hard, severe, rough) | |
| implacable(adjective, harsh, cruel, determined, fierce) | |
| intense(adjective, harsh, cruel, brutal) | |
| ironclad(adjective, set, hard, severe, harsh) | |
| oppressive(adjective, hard, severe, rough, difficult) |
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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> |