- Definitions|0
- Thesaurus|626
- Abbreviations|0
107 entries under strong topic. ×
| set(adjective, hard, serious, resolute) | |
| steel(adjective, hard, tough) | |
| thick(adjective, hard, tough, jellied) | |
| tight(adjective, hard, solid, stiff) | |
| tough inflexible(expression, hard, tough) | |
| unbreakable(adjective, hard, firm, solid) | |
| withstanding(adjective, hard, solid, stiff) |
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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> |