- Definitions|2
- Thesaurus|347
- Abbreviations|0
21 entries under protection topic. ×
| imperviousness(noun, security, rigidity, hardness) | |
| density(noun, mass, security, rigidity) | |
| impermeability(noun, security, rigidity, hardness) | |
| solidity(noun, mass, security, rigidity) | |
| hardness(noun, security, cruelty, rigidity) | |
| resistance(noun, security, rigidity, hardness) | |
| toughness(noun, security, rigidity, hardness) | |
| compactness(noun, mass, security, rigidity) | |
| durability(noun, security, rigidity, hardness) | |
| fixedness(noun, security, rigidity, hardness) | |
| impliability(noun, security, rigidity, hardness) | |
| inelasticity(noun, security, rigidity, hardness) | |
| inflexibility(noun, security, rigidity, hardness) | |
| rigidity(noun, security, hardness, density) | |
| temper(noun, security, rigidity, hardness) | |
| tensile strength(noun, expression, security, rigidity) | |
| airtightness(noun, security, impermeability, waterproofness) | |
| security(noun, waterproofness) | |
| stiffness(noun, security, rigidity, hardness) | |
| waterproofness(noun, security) |
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| APA | Smart Define. (2015). impenetrability thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/impenetrability/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "impenetrability thesaurus" https://smartdefine.org/impenetrability/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, impenetrability thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/impenetrability/thesaurus/synonyms>. |
| MLA | Smart Define. "impenetrability thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/impenetrability/thesaurus/synonyms> |