83 entries under firm topic. ×
| starchy(adjective, hard, solid, stiff) | |
| stark(adjective, hard, solid, stiff) | |
| stiff as a board(expression, adjective, idiom, hard) | |
| strong(adjective, set, hard, sound, tough) | |
| tense(adjective, hard, solid, stiff) | |
| thick(adjective, hard, tough, solid) | |
| tight(adjective, strong, hard, solid) | |
| unflexible(adjective, hard, solid, stiff) | |
| ungraceful(adjective, hard, solid, stiff) | |
| unsupple(adjective, hard, solid, stiff) | |
| wooden(adjective, hard, cool, solid) | |
| conglomerated(adjective, set, solid, unsubmissive) | |
| durable(adjective, strong, hard, solid) | |
| incompressible | |
| iron(adjective, set, strong, hard) | |
| monolithic(adjective, set, solid) | |
| packed(adjective, set, strong, hard) | |
| poured(adjective, set, solid) | |
| precast(adjective, set, solid, unsubmissive) | |
| rocky(adjective, set, strong, hard) |
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| APA | Smart Define. (2016). hardened thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/hardened/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "hardened thesaurus" https://smartdefine.org/hardened/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, hardened thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/hardened/thesaurus/synonyms>. |
| MLA | Smart Define. "hardened thesaurus" 29 March 2016. Web. 27 September 2026. <https://smartdefine.org/hardened/thesaurus/synonyms> |