50 entries under stiff topic. ×
| consolidated(adjective, firm, rigid) | |
| hardened(adjective, strong, hard, firm, solid) | |
| impenetrable(adjective, firm, rigid) | |
| indurate(adjective, firm, rigid) | |
| indurated(adjective, firm, rigid) | |
| inflexible(adjective, strong, hard, firm, solid) | |
| packed(adjective, firm, rigid) | |
| rocklike(adjective, firm, rigid) | |
| stony(adjective, firm, rigid) | |
| thick(adjective, firm, rigid) |
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| APA | Smart Define. (2015). durable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/durable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "durable thesaurus" https://smartdefine.org/durable/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, durable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/durable/thesaurus/synonyms>. |
| MLA | Smart Define. "durable thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/durable/thesaurus/synonyms> |