- Definitions|2
- Thesaurus|295
- Abbreviations|0
| adamant | |
| arduous | |
| bad | |
| brawny(adjective, strong, hard, solid, stiff) | |
| close | |
| compressed | |
| concrete | |
| condensed | |
| conditioned(adjective, strong, hard, solid, stiff) | |
| difficult | |
| fit(adjective, strong, hard, solid, stiff) | |
| gnarled | |
| granite | |
| hard-bitten(adjective, strong, hard, solid, stiff) | |
| hard as nails(expression, adjective, idiom, strong, hard) | |
| hard to chew(expression, idiom) | |
| impenetrable | |
| impervious | |
| impregnable | |
| indigestible(adjective, strong, hard, solid, stiff) |
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| APA | Smart Define. (2015). leathery thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/leathery/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "leathery thesaurus" https://smartdefine.org/leathery/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, leathery thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/leathery/thesaurus/synonyms>. |
| MLA | Smart Define. "leathery thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/leathery/thesaurus/synonyms> |