56 entries under rigid topic. ×
| hardened(adjective, set, strong, hard, tough) | |
| inelastic(adjective, hard, solid) | |
| tough inflexible(expression, strong, hard, tough, sturdy) | |
| unbreakable(adjective, strong, hard, firm, solid) | |
| ferric(adjective, strong, hard, tough, sturdy) | |
| ferrous(adjective, strong, hard, tough, sturdy) | |
| fine-grained(hard, solid) | |
| immovable(adjective, strong, hard, tough, sturdy) | |
| implacable(adjective, strong, hard, tough, sturdy) | |
| indomitable(adjective, strong, hard, tough, sturdy) | |
| indurate(adjective, set, strong, hard, firm) | |
| indurated(adjective, set, strong, hard, firm) | |
| inexorable(adjective, strong, hard, tough, sturdy) | |
| refractory(hard, solid) | |
| relentless(adjective, strong, hard, tough, sturdy) | |
| steel(adjective, strong, hard, tough, sturdy) |
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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> |