- Definitions|1
- Thesaurus|748
- Abbreviations|0
110 entries under adjective topic. ×
| callous(firm, stiff, rigid) | |
| ceaseless | |
| changeless | |
| cohesive(strong, hard, solid, stiff) | |
| compact(firm, stiff, rigid) | |
| compacted(firm, stiff, rigid) | |
| compressed(firm, stiff, rigid) | |
| concentrated(firm, stiff, rigid) | |
| conditioned(strong, hard, solid, stiff) | |
| consolidated(firm, stiff, rigid) | |
| constant | |
| dense(strong, hard, firm, solid) | |
| difficult | |
| fibrous(strong, hard, solid, stiff) | |
| fit(strong, hard, solid, stiff) | |
| hard-bitten(strong, hard, solid, stiff) | |
| hard as nails(expression, idiom, strong, hard) | |
| hardened(strong, hard, firm, solid) | |
| hardy(strong, hard, solid, stiff) | |
| healthy(strong, hard, solid, stiff) |
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| APA | Smart Define. (2016). unbreakable thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unbreakable/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "unbreakable thesaurus" https://smartdefine.org/unbreakable/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, unbreakable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unbreakable/thesaurus/synonyms>. |
| MLA | Smart Define. "unbreakable thesaurus" 5 January 2016. Web. 26 September 2026. <https://smartdefine.org/unbreakable/thesaurus/synonyms> |