55 entries under firm topic. ×
| cohere(form, set, develop, freeze) | |
| compact(verb, close, set, fix, settle) | |
| contract(verb, close, set, fix, settle) | |
| densify(verb, close, set, fix, settle) | |
| dry(verb, close, set, fix, settle) | |
| fossilize(verb, close, set, fix, settle) | |
| gelate(verb, form, set, fix, develop) | |
| gelatinize(verb, form, set, fix, develop) | |
| jellify(verb, form, set, fix, develop) | |
| press(verb, close, set, fix, settle) | |
| season(verb, dull, close, set, develop) | |
| starched(verb, close, set, fix) | |
| compress(harden, constrict, tauten) | |
| press down(expression, harden) | |
| tamp |
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| APA | Smart Define. (2015). stiffen thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/stiffen/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "stiffen thesaurus" https://smartdefine.org/stiffen/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, stiffen thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/stiffen/thesaurus/synonyms>. |
| MLA | Smart Define. "stiffen thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/stiffen/thesaurus/synonyms> |