423 entries under adjective topic. ×
| habitual(usual, established) | |
| impenitent(hard, tough, harsh, careless) | |
| impervious(noun, set, hard, tough) | |
| indurated(verb, hard, cool, firm) | |
| reinforced(verb, fortified, strengthened) | |
| seasoned(set, strong, hard, tough) | |
| unrelenting(hard, tough, harsh, determined) | |
| unresponsive(person, hard, careless, indifferent) | |
| unyielding(set, hard, tough, firm) | |
| calloused | |
| congealed(verb, set, hard, tough) | |
| cool(indifferent, blank, sophisticated, aloof) | |
| fortified(verb, strengthened) | |
| hard-nosed(hard, determined, resolute, unfeeling) | |
| intransigent(determined, fixed, resolute, stubborn) | |
| obstinate(determined, fixed, resolute, stubborn) | |
| ossified(firm, solid, determined, resolute) | |
| remorseless(hard, cold, cruel, pitiless) | |
| steeled(noun, verb, set, strong) | |
| stonyhearted |
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| APA | Smart Define. (2016). hardened thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/hardened/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "hardened thesaurus" https://smartdefine.org/hardened/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, hardened thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/hardened/thesaurus/synonyms>. |
| MLA | Smart Define. "hardened thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/hardened/thesaurus/synonyms> |