- Definitions|0
- Thesaurus|281
- Abbreviations|1
56 entries under sturdy topic. ×
| ferric(adjective, strong, hard, tough) | |
| ferrous(adjective, strong, hard, tough) | |
| firm(adjective, strong, hard, tough, severe) | |
| heavy(adjective, strong, hard, tough) | |
| immovable(adjective, strong, hard, tough) | |
| indomitable(adjective, strong, hard, tough) | |
| insensible(adjective, strong, hard, tough) | |
| obdurate(adjective, strong, hard, tough) | |
| robust(adjective, strong, hard, tough) | |
| rugged(adjective, strong, hard, tough) | |
| steel(adjective, strong, hard, tough) | |
| strong(adjective, hard, tough, rugged) | |
| thick(adjective, strong, hard, tough) | |
| tough inflexible(expression, strong, hard, tough) | |
| unbending(adjective, strong, hard, tough) | |
| unyielding(adjective, strong, hard, tough, severe) |
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| APA | Smart Define. (2013). by the book thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/by_the_book/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "by the book thesaurus" https://smartdefine.org/by_the_book/thesaurus/synonyms (accessed October 1, 2026). |
| Harvard | Smart Define 2013, by the book thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/by_the_book/thesaurus/synonyms>. |
| MLA | Smart Define. "by the book thesaurus" 19 May 2013. Web. 1 October 2026. <https://smartdefine.org/by_the_book/thesaurus/synonyms> |