incursion vs ingress

incursion and ingress both are nouns.

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

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

incursion: the act of entering some territory or domain (often in large numbers)
ingress: the act of entering

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

incursion (noun)	ingress (noun)
an attack that penetrates into enemy territory	the act of entering
the act of entering some territory or domain (often in large numbers)	(astronomy) the disappearance of a celestial body prior to an eclipse
the mistake of incurring liability or blame