0
soulless(adjective, hard, unfeeling, unsympathetic, hardened)
0
spiritless(adjective, hard, unfeeling, unsympathetic, hardened)
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stiff(adjective, hard, unfeeling, unsympathetic, hardened)
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stoical(adjective, callous, unexcitable)
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stony(adjective, hard, unfeeling, unsympathetic, hardened)
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tactless(unsympathetic, obtuse)
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torpid(adjective, hard, unfeeling, unsympathetic, hardened)
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tough(adjective, hard, unfeeling, unsympathetic, hardened)
0
unaffected(adjective, hard, unfeeling, unsympathetic, hardened)
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unconcerned(adjective, hard, unfeeling, unsympathetic, hardened)
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unexcitable(adjective, callous)
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unimpressible(adjective, callous, unexcitable)
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unimpressionable(adjective, hard, unfeeling, unsympathetic, hardened)
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unresponsive(adjective, hard, unfeeling, unsympathetic, hardened)
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unsentimental(adjective, toughened, cynical, hard-boiled, hard-bitten)
0
unsusceptible(adjective, hard, unfeeling, unsympathetic, hardened)
0
unsympathetic(adjective, hard, unfeeling, hardened, toughened)
0
untiring
15 years ago|110 views|share |citing 
APASmart Define. (2011). hard-as-nails thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/hard-as-nails/thesaurus/synonyms
ChicagoSmart Define. 2011. "hard-as-nails thesaurus" https://smartdefine.org/hard-as-nails/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2011, hard-as-nails thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/hard-as-nails/thesaurus/synonyms>.
MLASmart Define. "hard-as-nails thesaurus" 24 May 2011. Web. 29 September 2026. <https://smartdefine.org/hard-as-nails/thesaurus/synonyms>