107 entries under set topic. ×
| calloused(close, dry, jellied, gel) | |
| caseharden(close, harden, jellied, gel) | |
| fossilized(close, dry, jellied, gel) | |
| get hard(verb, expression, freeze, harden) | |
| mold(verb, harden) | |
| toughen up(verb, expression, harden, jellied) | |
| vitrified(close, dry, jellied, gel) |
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| APA | Smart Define. (2015). stiffen thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/stiffen/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "stiffen thesaurus" https://smartdefine.org/stiffen/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, stiffen thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/stiffen/thesaurus/synonyms>. |
| MLA | Smart Define. "stiffen thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/stiffen/thesaurus/synonyms> |