968 entries under adjective topic. ×
| firm(noun, feature, state, characteristic) | |
| persistent(feature, state, characteristic, strain) | |
| rigid(feature, state, characteristic, strong) | |
| hard(feature, state, characteristic, hard) | |
| strong(strong, severe, strain, firm) | |
| unyielding(strong, hard, tough, strain) | |
| stable(secure, strain, firm, steady) | |
| sound(strong, strain, solid, firmness) | |
| tight(close, strong, hard, secure) | |
| steadfast(feature, state, characteristic, strong) | |
| inflexible(hard, tough, severe, rough) | |
| steady(feature, state, characteristic, strain) | |
| stubborn(hard, tough, rough, firm) | |
| resistant(strong, hard, strain, firm) | |
| refractory(hard, tough, strain, rough) | |
| durable(strong, strain, firm, solid) | |
| fast(great, secure, strain, firm) | |
| stout(strong, strain, solid, firmness) | |
| substantial(strain, firmness, labour, hardiness) | |
| unalterable(strain, firmness, labour, hardiness) |
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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> |