- Definitions|0
- Thesaurus|245
- Abbreviations|0
66 entries under toughened topic. ×
| unconcerned(adjective, hard, unfeeling, unsympathetic, hardened) | |
| unimpressionable(adjective, hard, unfeeling, unsympathetic, hardened) | |
| unresponsive(adjective, hard, unfeeling, unsympathetic, hardened) | |
| unsentimental(adjective, cynical, hard-boiled, hard-bitten) | |
| unsusceptible(adjective, hard, unfeeling, unsympathetic, hardened) | |
| unsympathetic(adjective, hard, unfeeling, hardened) |
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| APA | Smart Define. (2011). hard-as-nails thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/hard-as-nails/thesaurus/synonyms |
| Chicago | Smart Define. 2011. "hard-as-nails thesaurus" https://smartdefine.org/hard-as-nails/thesaurus/synonyms (accessed October 1, 2026). |
| Harvard | Smart Define 2011, hard-as-nails thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/hard-as-nails/thesaurus/synonyms>. |
| MLA | Smart Define. "hard-as-nails thesaurus" 24 May 2011. Web. 1 October 2026. <https://smartdefine.org/hard-as-nails/thesaurus/synonyms> |