55 entries under close topic. ×
| steel(verb, dull, set, fix) | |
| temper(verb, set, fix, settle) | |
| consolidate(verb, place, set, fix) | |
| buttress(verb, support, calm, set) | |
| cement(verb, place, set, fix) | |
| nerve(verb, set, fix, settle) | |
| petrify(verb, set, fix, settle) | |
| starch(verb, set, fix, settle) | |
| callous(verb, dull, set, fix) | |
| curdle(verb, set, fix, settle) | |
| gird(verb, set, fix, settle) | |
| precipitate(verb, set, fix, settle) | |
| settle(verb, calm, set, fix) | |
| vitrify(verb, set, fix, settle) | |
| acclimate(verb, dull, set, develop) | |
| acclimatize(verb, dull, set, develop) | |
| amalgamate(verb, set, fix, settle) | |
| anneal(verb, set, fix, settle) | |
| bake(verb, set, fix, settle) | |
| calcify(verb, set, fix, settle) |
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| APA | Smart Define. (2015). stiffen thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/stiffen/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "stiffen thesaurus" https://smartdefine.org/stiffen/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, stiffen thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/stiffen/thesaurus/synonyms>. |
| MLA | Smart Define. "stiffen thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/stiffen/thesaurus/synonyms> |