128 entries under hard topic. ×
| durable(adjective, strong, firm, solid) | |
| hard as nails(expression, adjective, idiom, set, strong) | |
| hefty(adjective, person, body, strong) | |
| husky(adjective, person, body, strong) | |
| impervious(adjective, set, tough, solid) | |
| indigestible(adjective, strong, solid, stiff) | |
| iron(adjective, set, strong, tough) | |
| jelled(adjective, set, tough, solid) | |
| resistant(adjective, strong, solid, stiff) | |
| robust(adjective, person, body, strong) | |
| rocky(adjective, set, strong, firm) | |
| secure(adjective, close, strong, firm) | |
| strict(adjective, strong, tough, sturdy) | |
| adamant(adjective, strong, tough, sturdy) | |
| callous(adjective, set, strong, firm) | |
| close-grained(adjective, set, tough, firm) | |
| fixed(adjective, set, strong, firm) | |
| hard-bitten(adjective, strong, solid, stiff) | |
| hardened(adjective, set, strong, tough) | |
| inelastic(adjective, solid, rigid) |
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| APA | Smart Define. (2015). dense thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/dense/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "dense thesaurus" https://smartdefine.org/dense/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, dense thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/dense/thesaurus/synonyms>. |
| MLA | Smart Define. "dense thesaurus" 17 July 2015. Web. 24 September 2026. <https://smartdefine.org/dense/thesaurus/synonyms> |