45 entries under noun topic. ×

1
temper(protection, security, rigidity, hardness)
1
tensile strength(expression, protection, security, rigidity)
1
toughness(protection, security, rigidity, hardness)
0
assurance
0
confidence
0
constancy
0
darkness
0
decision
0
determination
0
dimness
0
impassability
0
memory
0
murkiness
0
obscurity
0
obstinacy
0
opaqueness
0
protection(resistance, security, invulnerability, waterproofness)
0
resolution
0
retention
0
retentiveness
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APASmart Define. (2015). impermeability thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/impermeability/thesaurus/synonyms
ChicagoSmart Define. 2015. "impermeability thesaurus" https://smartdefine.org/impermeability/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, impermeability thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/impermeability/thesaurus/synonyms>.
MLASmart Define. "impermeability thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/impermeability/thesaurus/synonyms>