6
impermeableness
4
cohesion
4
impenetrability(noun, protection, security, rigidity, hardness)
4
imperviousness(noun, resistance, protection, security, rigidity)
4
solidity(noun, resistance, protection, security, rigidity)
3
density(noun, protection, security, rigidity, hardness)
2
closeness
2
consistency
2
constipation(closure, density)
2
hardness(noun, protection, security, rigidity, density)
2
opacity
2
tightness
1
blockade
1
closure
1
compactness(noun, protection, security, rigidity, hardness)
1
congestion
1
consistence
1
contraction
1
durability(noun, protection, security, rigidity, hardness)
1
embolus
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APASmart Define. (2015). impermeability thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/impermeability/thesaurus/synonyms
ChicagoSmart Define. 2015. "impermeability thesaurus" https://smartdefine.org/impermeability/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, impermeability thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/impermeability/thesaurus/synonyms>.
MLASmart Define. "impermeability thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/impermeability/thesaurus/synonyms>