- Definitions|2
- Thesaurus|347
- Abbreviations|0
| temper(noun, protection, security, rigidity, hardness) | |
| tensile strength(noun, expression, protection, security, rigidity) | |
| tightness(noun, mass, bulk, density, thickness) | |
| unintelligibility | |
| vagueness | |
| viscosity | |
| air of mystery(expression, idiom) | |
| airtightness(noun, protection, security, impermeability, waterproofness) | |
| ambitiousness | |
| arcaneness | |
| bulk(noun, mass, density, thickness, impermeability) | |
| cold-bloodedness(noun, cruelty) | |
| cold-heartedness | |
| concentration(noun, mass, thickness) | |
| concreteness(noun, mass, thickness) | |
| crowding | |
| darkness | |
| denser | |
| grandiosity | |
| hardheartedness(noun, cruelty) |
For more, visit
Impenetrability on
Power Thesaurus
| APA | Smart Define. (2015). impenetrability thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/impenetrability/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "impenetrability thesaurus" https://smartdefine.org/impenetrability/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, impenetrability thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/impenetrability/thesaurus/synonyms>. |
| MLA | Smart Define. "impenetrability thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/impenetrability/thesaurus/synonyms> |