- Definitions|2
- Thesaurus|103
- Abbreviations|0
21 entries under rigid topic. ×
| ferric(adjective, strong, hard, tough, sturdy) | |
| steel(adjective, strong, hard, tough, sturdy) | |
| steely(adjective, strong, hard, tough, sturdy) | |
| dense(adjective, strong, hard, tough, sturdy) | |
| adamant(adjective, strong, hard, tough, sturdy) | |
| adamantine(adjective, strong, hard, tough, sturdy) | |
| firm(adjective, strong, hard, tough, sturdy) | |
| hard(adjective, strong, tough, sturdy) | |
| heavy(adjective, strong, hard, tough, sturdy) | |
| immovable(adjective, strong, hard, tough, sturdy) | |
| implacable(adjective, strong, hard, tough, sturdy) | |
| indomitable(adjective, strong, hard, tough, sturdy) | |
| inexorable(adjective, strong, hard, tough, sturdy) | |
| insensible(adjective, strong, hard, tough, sturdy) | |
| obdurate(adjective, strong, hard, tough, sturdy) | |
| relentless(adjective, strong, hard, tough, sturdy) | |
| robust(adjective, strong, hard, tough, sturdy) | |
| strong(adjective, hard, tough, sturdy) | |
| thick(adjective, strong, hard, tough, sturdy) | |
| unbending(adjective, strong, hard, tough, sturdy) |
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| APA | Smart Define. (2015). ferrous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/ferrous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "ferrous thesaurus" https://smartdefine.org/ferrous/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, ferrous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/ferrous/thesaurus/synonyms>. |
| MLA | Smart Define. "ferrous thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/ferrous/thesaurus/synonyms> |