Synonyms|116Antonyms|53|Broader|4Narrower|1Related|173
0
mystification
0
numinousness
0
obtuseness
0
protection(noun, security, waterproofness)
0
remorselessness(noun, cruelty)
0
ruthlessness(noun, cruelty)
0
security(noun, protection, waterproofness)
0
solidness
0
spissitude
0
stiffness(noun, protection, security, rigidity, hardness)
0
uncanniness
0
uncaringness(noun, cruelty)
0
unfathomability
0
unfeelingness(noun, cruelty)
0
waterproofness(noun, protection, security)
0
watertightness(noun, protection, security, waterproofness)
For more, visit Impenetrability on Power Thesaurus
11 years ago|2.7k views|share |citing 
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>