admittance vs ingress

admittance and ingress both are nouns.

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

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

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

admittance (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