- Definitions|0
- Thesaurus|626
- Abbreviations|0
307 entries under adjective topic. ×
| stern(tough, severe, harsh, cruel) | |
| stiff(set, strong, hard, tough) | |
| stiff upper lip(expression, idiom, calm, cool) | |
| stoical(calm, cool, steady, tranquil) | |
| strict(tough, severe, firm, harsh) | |
| substantial(strong, sound, tough, solid) | |
| tactless(hard, indifferent, unkind, unresponsive) | |
| tenacious(strong, hard, sound, tough) | |
| thick-skinned(calm, hard, cool, tough) | |
| tough as nails(expression, idiom, strong, hard) | |
| unaffected(calm, cool, steady, tranquil) | |
| unashamed(unfeeling, callous, unbending, toughened) | |
| unbending(strong, hard, tough, fixed) | |
| uncompromising(tough, firm, fixed, distant) | |
| unconcerned(hard, indifferent, unkind, unresponsive) | |
| undisturbed(calm, cool, steady, tranquil) | |
| unexcitable(calm, cool, steady, unaffected) | |
| unfeeling(hard, tough, rough, harsh) | |
| unflappable(calm, cool, steady, unaffected) | |
| unflexible(tough, firm, stiff, distant) |
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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> |