91 entries under adjective topic. ×

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disciplined(verb, calcify, curdled, calloused)
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disdainful(hard, unfeeling, unsympathetic, hardened)
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habituated(hard, unfeeling, unsympathetic, hardened)
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hard-as-nails(hard, unfeeling, unsympathetic, hardened)
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hard-bitten(hard, unfeeling, unsympathetic, hardened)
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hard-boiled(hard, unfeeling, unsympathetic, hardened)
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hard as nails(expression, idiom, callous, disciplined)
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hardboiled(callous, disciplined, unexcitable, grooved)
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hardhearted(hard, unfeeling, unsympathetic, hardened)
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heartless(hard, unfeeling, unsympathetic, hardened)
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impassible
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impassive(hard, unfeeling, unsympathetic, hardened)
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impenetrable(hard, unfeeling, unsympathetic, hardened)
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impenitent(hard, unfeeling, unsympathetic, hardened)
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impertinent
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impious(hard, unfeeling, unsympathetic, hardened)
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inaccessible(hard, unfeeling, unsympathetic, hardened)
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indifferent(hard, unfeeling, unsympathetic, hardened)
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indurated(hard, unfeeling, unsympathetic, hardened)
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insentient(hard, unfeeling, unsympathetic, hardened)
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APASmart Define. (2013). casehardened thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/casehardened/thesaurus/synonyms
ChicagoSmart Define. 2013. "casehardened thesaurus" https://smartdefine.org/casehardened/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2013, casehardened thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/casehardened/thesaurus/synonyms>.
MLASmart Define. "casehardened thesaurus" 19 May 2013. Web. 25 September 2026. <https://smartdefine.org/casehardened/thesaurus/synonyms>