impermeability vs impermeableness

impermeability and impermeableness both are nouns.

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

As nouns, impermeability and impermeableness are synonyms defined as:

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

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