127 entries under hard topic. ×
| rooted(adjective, strong, substantial, compact) | |
| steel(adjective, strong, tough, sturdy) | |
| steely(adjective, dull, strong, tough) | |
| stiff-necked(adjective, strong, tough, sturdy) | |
| tough inflexible(expression, strong, tough, sturdy) | |
| unrelenting(adjective, strong, tough, severe) | |
| unshakable(adjective, strong, substantial, compact) |
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| APA | Smart Define. (2016). heavy thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/heavy/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "heavy thesaurus" https://smartdefine.org/heavy/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, heavy thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/heavy/thesaurus/synonyms>. |
| MLA | Smart Define. "heavy thesaurus" 25 January 2016. Web. 25 September 2026. <https://smartdefine.org/heavy/thesaurus/synonyms> |