- Definitions|0
- Thesaurus|626
- Abbreviations|0
| bent(adjective, serious, resolute, persistent, driven) | |
| bent on(expression, adjective, serious, resolute, persistent) | |
| benumbed(adjective, unfeeling, unbending, toughened, seasoned) | |
| bitter(adjective, tough, harsh, cruel, grim) | |
| bleak(adjective, tough, severe, harsh, cruel) | |
| blind to(expression, adjective, callous, disciplined, unexcitable) | |
| bloodthirsty(adjective, vicious, savage, pitiless, ruthless) | |
| blubbery | |
| brick wall | |
| brutal(adjective, tough, harsh, cruel, grim) | |
| buckled down(expression, adjective, serious, resolute, persistent) | |
| caked | |
| calcified | |
| calm(adjective, cool, steady, collected, unflappable) | |
| casehardened(adjective, callous, disciplined, unexcitable, grooved) | |
| choate | |
| clabbered | |
| close | |
| close-grained | |
| coadunate |
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| APA | Smart Define. (2015). hard as nails thesaurus. Retrieved September 28, 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 28, 2026). |
| Harvard | Smart Define 2015, hard as nails thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/hard_as_nails/thesaurus/synonyms>. |
| MLA | Smart Define. "hard as nails thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/hard_as_nails/thesaurus/synonyms> |