99 entries under firm topic. ×
| set in stone(expression, adjective, idiom, set) | |
| settle(verb, close, set, fix) | |
| starch(verb, close, set, fix, settle) | |
| steel(verb, close, set, fix, settle) | |
| steeled(adjective, set, solid, hardened) | |
| stiffen(verb, close, set, fix, settle) | |
| temper(verb, close, set, fix, settle) | |
| tough(adjective, set, hard, solid) | |
| toughen(verb, close, set, fix, settle) | |
| vitrified(adjective, close, set, fix) | |
| vitrify(verb, close, set, fix, settle) | |
| adamantine(adjective, set, strong, hard) | |
| casehardened(close, set, dry, harden) | |
| durable(adjective, stiff, rigid) | |
| indurated(adjective, set, strong, hard) | |
| press down(expression, harden) | |
| rocky(adjective, set, strong, hard) | |
| stony(adjective, set, strong, hard) | |
| unbreakable(adjective, stiff, rigid) |
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| APA | Smart Define. (2016). compact thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/compact/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "compact thesaurus" https://smartdefine.org/compact/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, compact thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/compact/thesaurus/synonyms>. |
| MLA | Smart Define. "compact thesaurus" 31 March 2016. Web. 23 September 2026. <https://smartdefine.org/compact/thesaurus/synonyms> |