- Definitions|0
- Thesaurus|626
- Abbreviations|0
107 entries under strong topic. ×
| potent(adjective, sound, tough, heavy) | |
| tough(adjective, hard, sound, continue) | |
| hale(adjective, sound, tough, solid) | |
| hard(adjective, set, tough, continue) | |
| hardy(adjective, set, hard, sound) | |
| rugged(adjective, set, hard, sound) | |
| stalwart(adjective, hard, sound, tough) | |
| dense(adjective, set, hard, tough) | |
| flinty(adjective, hard, firm, solid) | |
| forceful(adjective, sound, tough, solid) | |
| forcible(adjective, sound, tough, solid) | |
| hard-bitten(adjective, hard, continue, solid) | |
| hearty(adjective, sound, tough, solid) | |
| lusty(adjective, hard, solid, stiff) | |
| mighty(adjective, hard, sound, tough) | |
| obdurate(adjective, hard, tough, firm) | |
| powerful(adjective, sound, tough, solid) | |
| puissant | |
| resistant(adjective, hard, solid, stiff) | |
| robust(adjective, hard, sound, tough) |
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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> |