penetration vs incoming

penetration and incoming both are nouns.

Word	Noun	Adjective	Verb	Adverb
penetration	Yes	No	No	No
incoming	Yes	Yes	No	No

As nouns, incoming is a hypernym of penetration; that is, incoming is a word with a broader meaning than penetration:

Other hypernyms of penetration include entering, entrance, entry, ingress.

penetration (noun)	incoming (noun)
an attack that penetrates into enemy territory	the act of entering
the act of entering into or through something
the act (by a man) of inserting his penis into the vagina of a woman
the depth to which something penetrates (especially the depth reached by a projectile that hits a target)
the ability to make way into or through something
clear or deep perception of a situation

penetration (adjective)	incoming (adjective)
	arriving at a place or position
	entering upon a position of office vacated by another