- Definitions|2
- Thesaurus|371
- Abbreviations|0
17 entries under tough topic. ×
| unbreakable(adjective, strong, firm, rigid) | |
| permanent(adjective, strong, sturdy, constant) | |
| durable(adjective, strong, stable, sturdy) | |
| enduring(adjective, stable, sturdy, constant) | |
| lasting(adjective, strong, stable, sturdy) | |
| fixed(adjective, stable, sturdy, constant) | |
| abiding(adjective, stable, sturdy, constant) | |
| constant(adjective, stable, sturdy, enduring) | |
| perdurable(adjective, strong, stable, constant) | |
| long-lasting(adjective, stable, sturdy, constant) | |
| firm(adjective, strong, sturdy, permanent) | |
| persistent(adjective, stable, moral, sturdy) | |
| stable(adjective, sturdy, constant, enduring) | |
| strong(adjective, sturdy, permanent, untouchable) | |
| perduring(stable, sturdy, constant, enduring) | |
| reliable(adjective, moral, sturdy, principled) | |
| resilient(adjective, strong, sturdy, permanent) |
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| APA | Smart Define. (2015). indestructible thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/indestructible/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "indestructible thesaurus" https://smartdefine.org/indestructible/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, indestructible thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/indestructible/thesaurus/synonyms>. |
| MLA | Smart Define. "indestructible thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/indestructible/thesaurus/synonyms> |