50 entries under stiff topic. ×
| set(verb, adjective, calm, strong, secure) | |
| staunch(adjective, calm, strong, sound, secure) | |
| adamantine(adjective, strong, tough, firm) | |
| dense(adjective, strong, hard, firm, solid) | |
| healthy(adjective, strong, hard, solid, heavy) | |
| iron(adjective, firm, rigid) | |
| rocky(adjective, firm, rigid) | |
| secure(adjective, calm, strong, sound, tough) | |
| sinewy(adjective, strong, hard, sound, tough) | |
| athletic(adjective, strong, sound, tough, solid) | |
| mighty(adjective, strong, hard, sound, tough) | |
| muscular(adjective, strong, sound, tough, solid) | |
| powerful(adjective, strong, sound, tough, solid) | |
| resolute(adjective, calm, strong, secure, firm) | |
| strapping(adjective, strong, hard, sound, tough) | |
| callous(adjective, firm, rigid) | |
| compact(adjective, firm, rigid) | |
| compacted(adjective, firm, rigid) | |
| compressed(adjective, firm, rigid) | |
| concentrated(adjective, firm, rigid) |
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| APA | Smart Define. (2015). durable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/durable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "durable thesaurus" https://smartdefine.org/durable/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, durable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/durable/thesaurus/synonyms>. |
| MLA | Smart Define. "durable thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/durable/thesaurus/synonyms> |