- Definitions|0
- Thesaurus|626
- Abbreviations|0
100 entries under hard topic. ×
| imperceptive(adjective, indifferent, unkind, unresponsive) | |
| incurious(adjective, indifferent, unkind, unresponsive) | |
| indurated(adjective, set, strong, unfeeling) | |
| inexorable(adjective, strong, tough, firm) | |
| inflexible(adjective, set, strong, tough) | |
| insensitive(adjective, tough, indifferent, cruel) | |
| insusceptible(adjective, insensitive, unsusceptible) | |
| obtuse(adjective, indifferent, unfeeling, unkind) | |
| relentless(adjective, strong, tough, firm) | |
| rigid(adjective, set, strong, tough) | |
| seasoned(adjective, strong, solid, stiff) | |
| sinewy(adjective, strong, sound, tough) | |
| steeled(adjective, strong, solid, stiff) | |
| stiff(adjective, set, strong, tough) | |
| tactless(adjective, indifferent, unkind, unresponsive) | |
| tenacious(adjective, strong, sound, tough) | |
| thick-skinned(adjective, calm, cool, tough) | |
| tough as nails(expression, adjective, idiom, strong) | |
| unbending(adjective, strong, tough, fixed) | |
| unconcerned(adjective, indifferent, unkind, unresponsive) |
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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> |