permeation vs interpenetration

permeation and interpenetration both are nouns.

Word	Noun	Adjective	Verb	Adverb
permeation	Yes	No	No	No
interpenetration	Yes	No	No	No

As nouns, permeation and interpenetration are synonyms defined as:

permeation and interpenetration: mutual penetration; diffusion of each through the other

permeation (noun)	interpenetration (noun)
mutual penetration; diffusion of each through the other	mutual penetration; diffusion of each through the other
the process of permeating or infusing something with a substance	the action of penetrating between or among