| solidifying(noun, verb, freezing, congealing) | |
| solidification | |
| stiffening(noun, verb, freezing) | |
| toughening(noun, verb, strengthening) | |
| firming | |
| tempering(verb, strengthening) | |
| set | |
| strengthening(verb, strengthening) | |
| calcification(noun, freezing) | |
| induration | |
| ossification(noun, freezing) | |
| setting(noun, verb, freezing, congealing) | |
| accustoming | |
| arteriosclerosis | |
| bracing(verb, strengthening) | |
| coagulating(verb, congealing) | |
| congealing(verb, congealing) | |
| curing | |
| fortifying(verb, strengthening) | |
| harden |
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| APA | Smart Define. (2015). hardening thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/hardening/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "hardening thesaurus" https://smartdefine.org/hardening/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, hardening thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/hardening/thesaurus/synonyms>. |
| MLA | Smart Define. "hardening thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/hardening/thesaurus/synonyms> |