- Definitions|0
- Thesaurus|60
- Abbreviations|0
36 entries under hard topic. ×
| massed(adjective, compact, dense) | |
| material(adjective, compact, dense) | |
| physical(adjective, compact, dense) | |
| rock(adjective, compact, dense) | |
| rock-solid(adjective, compact, dense) | |
| rocklike(adjective, compact, dense) | |
| rooted(adjective, compact, dense) | |
| secure(adjective, compact, dense) | |
| sound(adjective, compact, dense) | |
| stable(adjective, compact, dense) | |
| strong(adjective, compact, dense) | |
| sturdy(adjective, compact, dense) | |
| substantial(adjective, compact, dense) | |
| thick(adjective, compact, dense) | |
| tight(adjective, compact, dense) | |
| unshakable(adjective, compact, dense) |
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| APA | Smart Define. (2013). rock-hard thesaurus. Retrieved September 28, 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 28, 2026). |
| Harvard | Smart Define 2013, rock-hard thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/rock-hard/thesaurus/synonyms>. |
| MLA | Smart Define. "rock-hard thesaurus" 17 June 2013. Web. 28 September 2026. <https://smartdefine.org/rock-hard/thesaurus/synonyms> |