- Definitions|0
- Thesaurus|626
- Abbreviations|0
68 entries under solid topic. ×
| fit(adjective, strong, hard, stiff) | |
| indigestible(adjective, strong, hard, stiff) | |
| leathery(adjective, strong, hard, stiff) | |
| molded(adjective, strong, hard, stiff) | |
| resilient(adjective, strong, hard, stiff) | |
| tight(adjective, strong, hard, stiff) | |
| unbreakable(adjective, strong, hard, firm) | |
| withstanding(adjective, strong, hard, stiff) |
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| APA | Smart Define. (2015). hard as nails thesaurus. Retrieved September 27, 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 27, 2026). |
| Harvard | Smart Define 2015, hard as nails thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/hard_as_nails/thesaurus/synonyms>. |
| MLA | Smart Define. "hard as nails thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/hard_as_nails/thesaurus/synonyms> |