ingress vs disappearance

ingress and disappearance both are nouns.

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

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

ingress: (astronomy) the disappearance of a celestial body prior to an eclipse
disappearance: the event of passing out of sight

ingress (noun)	disappearance (noun)
the act of entering	the act of leaving secretly or without explanation
(astronomy) the disappearance of a celestial body prior to an eclipse	gradually ceasing to be visible
	the event of passing out of sight
	ceasing to exist