entering vs ingress

entering and ingress both are nouns.

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

As nouns, entering and ingress are synonyms defined as:

Other synonyms of entering include entrance, entry, incoming.

entering (noun)	ingress (noun)
the act of entering	the act of entering
a movement into or inward	(astronomy) the disappearance of a celestial body prior to an eclipse