128 entries under hard topic. ×
| severe(adjective, strong, tough, big) | |
| steel(adjective, strong, tough, sturdy) | |
| steeled(adjective, strong, solid, stiff) | |
| stiff-necked(adjective, strong, tough, stupid) | |
| unrelenting(adjective, strong, tough, sturdy) | |
| unshakable(adjective, strong, substantial, compact) | |
| unsparing(adjective, strong, tough, sturdy) | |
| withstanding(adjective, strong, solid, stiff) |
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| APA | Smart Define. (2015). dense thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/dense/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "dense thesaurus" https://smartdefine.org/dense/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, dense thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/dense/thesaurus/synonyms>. |
| MLA | Smart Define. "dense thesaurus" 17 July 2015. Web. 24 September 2026. <https://smartdefine.org/dense/thesaurus/synonyms> |