- Definitions|1
- Thesaurus|180
- Abbreviations|0
| impenetrability(noun, protection, security, rigidity, hardness) | |
| immunity(noun, support, cover, check, resist) | |
| impermeability(noun, resistance, protection, security, rigidity) | |
| tolerance(noun, resistance, immunity) | |
| insusceptibility(noun, support, cover, check, resist) | |
| invulnerability(noun, resistance, protection, reassurance, impermeability) | |
| resistance(noun, support, cover, check, resist) | |
| thick skin(noun, expression, idiom, ability) | |
| unsusceptibility(noun, resist, capacity, resistance, impermeability) | |
| armor | |
| callousness | |
| firmness(noun, rigidity, hardness) | |
| hardness(noun, protection, security, rigidity, density) | |
| imperforation | |
| insensitivity | |
| blockade | |
| callus | |
| closure | |
| compactness(noun, protection, security, rigidity, hardness) | |
| constipation |
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| APA | Smart Define. (2015). imperviousness thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/imperviousness/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "imperviousness thesaurus" https://smartdefine.org/imperviousness/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, imperviousness thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/imperviousness/thesaurus/synonyms>. |
| MLA | Smart Define. "imperviousness thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/imperviousness/thesaurus/synonyms> |