impermeableness vs impermeability

impermeableness and impermeability both are nouns.

Word	Noun	Adjective	Verb	Adverb
impermeableness	Yes	No	No	No
impermeability	Yes	No	No	No

As nouns, impermeableness and impermeability are synonyms defined as:

impermeableness and impermeability: the property of something that cannot be pervaded by a liquid

impermeableness (noun)	impermeability (noun)
the property of something that cannot be pervaded by a liquid	the property of something that cannot be pervaded by a liquid