permeability vs porosity

permeability and porosity both are nouns.

Word	Noun	Adjective	Verb	Adverb
permeability	Yes	No	No	No
porosity	Yes	No	No	No

As nouns, porosity is a hypernym of permeability; that is, porosity is a word with a broader meaning than permeability:

permeability: the property of something that can be pervaded by a liquid (as by osmosis or diffusion)
porosity: the property of being porous; being able to absorb fluids

Other hypernyms of permeability include porousness.

permeability (noun)	porosity (noun)
the property of something that can be pervaded by a liquid (as by osmosis or diffusion)	the property of being porous; being able to absorb fluids