- Definitions|0
- Thesaurus|60
- Abbreviations|0
| rock-solid(adjective, hard, compact, dense) | |
| rocklike(adjective, hard, compact, dense) | |
| rooted(adjective, hard, compact, dense) | |
| secure(adjective, hard, compact, dense) | |
| sound(adjective, hard, compact, dense) | |
| stable(adjective, hard, compact, dense) | |
| stiff | |
| strong(adjective, hard, compact, dense) | |
| sturdy(adjective, hard, compact, dense) | |
| substantial(adjective, hard, compact, dense) | |
| thick(adjective, hard, compact, dense) | |
| tight(adjective, hard, compact, dense) | |
| unshakable(adjective, hard, compact, dense) | |
| erect |
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| APA | Smart Define. (2013). rock-hard thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/rock-hard/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "rock-hard thesaurus" https://smartdefine.org/rock-hard/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2013, rock-hard thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/rock-hard/thesaurus/synonyms>. |
| MLA | Smart Define. "rock-hard thesaurus" 17 June 2013. Web. 27 September 2026. <https://smartdefine.org/rock-hard/thesaurus/synonyms> |