Synonyms|116Antonyms|53|Broader|4Narrower|1Related|173
1
equivocation
1
fixedness(noun, protection, security, rigidity, hardness)
1
frequency(noun, mass, bulk, density, thickness)
1
heaviness(noun, mass, bulk, density, thickness)
1
impermeableness
1
impliability(noun, protection, security, rigidity, hardness)
1
incomprehensibility
1
incomprehensibleness
1
inelasticity(noun, protection, security, rigidity, hardness)
1
inflexibility(noun, protection, security, rigidity, hardness)
1
invincibility
1
invulnerability
1
murkiness
1
mysteriousness
1
mystique
1
opaqueness
1
quantity(noun, mass, bulk, density, thickness)
1
rigidity(noun, protection, security, hardness, density)
1
specific gravity
1
substantiality(noun, mass, bulk, density, thickness)
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APASmart Define. (2015). impenetrability thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/impenetrability/thesaurus/synonyms
ChicagoSmart Define. 2015. "impenetrability thesaurus" https://smartdefine.org/impenetrability/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, impenetrability thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/impenetrability/thesaurus/synonyms>.
MLASmart Define. "impenetrability thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/impenetrability/thesaurus/synonyms>