- Definitions|0
- Thesaurus|626
- Abbreviations|0
54 entries under callous topic. ×
| harsh(adjective, tough, cruel, grim, unfeeling) | |
| impassive(adjective, hard, insensitive, unexcitable) | |
| indifferent(adjective, unkind, unresponsive, crass) | |
| inexcitable(adjective, unexcitable, hard-as-nails) | |
| inhuman(adjective, cruel, unfeeling, insensitive) | |
| matter of fact(expression, adjective, idiom, unfeeling) | |
| merciless(adjective, cruel, vicious, unfeeling, pitiless) | |
| poker-faced(adjective, unexcitable, hard-as-nails) | |
| ruthless(adjective, cruel, vicious, unfeeling, brutal) | |
| savage(adjective, cruel, vicious, unfeeling, pitiless) | |
| uncompassionate(adjective, cruel, unfeeling, insensitive) | |
| unemotional(adjective, cruel, unfeeling, insensitive) | |
| unimpressible(adjective, stiff, unfeeling, hard-hearted) | |
| unsympathetic(adjective, tough, harsh, cruel, grim) |
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| APA | Smart Define. (2015). hard as nails thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/hard_as_nails/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "hard as nails thesaurus" https://smartdefine.org/hard_as_nails/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2015, hard as nails thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/hard_as_nails/thesaurus/synonyms>. |
| MLA | Smart Define. "hard as nails thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/hard_as_nails/thesaurus/synonyms> |