- Definitions|2
- Thesaurus|1.1k
- Abbreviations|0
59 entries under firm topic. ×
| tough(adjective, strong, hard, serious) | |
| unyielding(adjective, strong, hard, tough) | |
| flinty(adjective, strong, hard, tough) | |
| inflexible(adjective, strong, hard, tough) | |
| adamantine(adjective, strong, hard, tough) | |
| hard(adjective, strong, tough, solid) | |
| stony(adjective, hard, solid, hostile) | |
| rigid(adjective, strong, hard, tough) | |
| unbending(adjective, strong, hard, tough) | |
| stiff(adjective, set, hard, dead) | |
| impenetrable(adjective, rigid, unyielding) | |
| set(adjective, hard, solid, resolute) | |
| indestructible(adjective, rigid, unyielding) | |
| indurate(adjective, hard, solid, stiff) | |
| rock-hard(adjective, rigid, unyielding) | |
| rocky(adjective, rigid, unyielding) | |
| unbreakable(adjective, rigid, unyielding) | |
| hardened(adjective, hard, solid, cold) | |
| inelastic(adjective, hard, solid, stiff) | |
| solid(adjective, hard, stiff, tense) |
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| APA | Smart Define. (2015). steely thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/steely/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "steely thesaurus" https://smartdefine.org/steely/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, steely thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/steely/thesaurus/synonyms>. |
| MLA | Smart Define. "steely thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/steely/thesaurus/synonyms> |