70 entries under noun topic. ×

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friction(resistance, impermeability, invulnerability)
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halting(resistance, impermeability, invulnerability, renitency)
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holding(resistance, impermeability, invulnerability)
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impediment(resistance, impermeability, invulnerability)
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impeding(resistance, impermeability, invulnerability)
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implacability
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intransigence(resistance, impermeability, invulnerability, implacability)
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obduracy
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opaqueness
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parrying(resistance, impermeability, invulnerability)
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pigheadedness
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protecting(resistance, protection, reassurance, impermeability)
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protection(resistance, security, reassurance, impermeability)
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rebuff(resistance, impermeability, invulnerability)
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refusal(resistance, impermeability, invulnerability)
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retardation(resistance, impermeability, invulnerability)
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safeguard(resistance, impermeability, invulnerability)
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safety
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screen(resistance, impermeability, invulnerability)
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shield(resistance, impermeability, invulnerability)
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APASmart Define. (2015). imperviousness thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/imperviousness/thesaurus/synonyms
ChicagoSmart Define. 2015. "imperviousness thesaurus" https://smartdefine.org/imperviousness/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, imperviousness thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/imperviousness/thesaurus/synonyms>.
MLASmart Define. "imperviousness thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/imperviousness/thesaurus/synonyms>