irruption vs ingress

irruption and ingress both are nouns.

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

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

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

irruption (noun)	ingress (noun)
a sudden violent entrance; a bursting in	the act of entering
a sudden violent spontaneous occurrence (usually of some undesirable condition)	(astronomy) the disappearance of a celestial body prior to an eclipse
a sudden sharp increase in the relative numbers of a population