55 entries under close topic. ×
| compact(verb, set, fix, settle) | |
| concrete(set, harden, thicken, coagulate) | |
| contract(verb, set, fix, settle) | |
| densify(verb, set, fix, settle) | |
| dry(verb, set, fix, settle) | |
| firming(verb, contract, compact, brace) | |
| fossilize(verb, set, fix, settle) | |
| press(verb, set, fix, settle) | |
| season(verb, dull, set, develop) | |
| starched(verb, set, fix, firm) | |
| calcified(contract, compact, jellied, gel) | |
| calloused(set, dry, jellied, gel) | |
| caseharden(set, harden, jellied, gel) | |
| fossilized(set, dry, jellied, gel) | |
| vitrified(set, 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> |