admission vs ingress

admission and ingress both are nouns.

Word	Noun	Adjective	Verb	Adverb
admission	Yes	No	No	No
ingress	Yes	No	No	No

As nouns, ingress is a hypernym of admission; that is, ingress is a word with a broader meaning than admission:

Other hypernyms of admission include entering, entrance, entry, incoming.

admission (noun)	ingress (noun)
the act of admitting someone to enter	the act of entering
the right to enter	(astronomy) the disappearance of a celestial body prior to an eclipse
an acknowledgment of the truth of something
the fee charged for admission