- Definitions|2
- Thesaurus|228
- Abbreviations|0
56 entries under hard topic. ×
| ferric(adjective, strong, tough, sturdy) | |
| ferrous(adjective, strong, tough, sturdy) | |
| heavy(adjective, strong, tough, sturdy) | |
| immovable(adjective, strong, tough, sturdy) | |
| indomitable(adjective, strong, tough, sturdy) | |
| insensible(adjective, strong, tough, sturdy) | |
| obdurate(adjective, strong, tough, sturdy) | |
| robust(adjective, strong, tough, sturdy) | |
| rugged(adjective, strong, tough, sturdy) | |
| steel(adjective, strong, tough, sturdy) | |
| strong(adjective, tough, sturdy, rugged) | |
| sturdy(adjective, strong, tough, rugged) | |
| thick(adjective, strong, tough, sturdy) | |
| tough inflexible(expression, strong, tough, sturdy) | |
| unbending(adjective, strong, tough, sturdy) | |
| unyielding(adjective, strong, tough, severe) |
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| APA | Smart Define. (2015). disciplinary thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/disciplinary/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "disciplinary thesaurus" https://smartdefine.org/disciplinary/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, disciplinary thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/disciplinary/thesaurus/synonyms>. |
| MLA | Smart Define. "disciplinary thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/disciplinary/thesaurus/synonyms> |