penetration vs entering

penetration and entering both are nouns.

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

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

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

penetration (noun)	entering (noun)
an attack that penetrates into enemy territory	the act of entering
the act of entering into or through something	a movement into or inward
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