egression vs egress

egression and egress both are nouns.

Word	Noun	Adjective	Verb	Adverb
egression	Yes	No	No	No
egress	Yes	No	Yes	No

As nouns, egression and egress are synonyms defined as:

egression and egress: the act of coming (or going) out; becoming apparent

Other synonyms of egression include emergence.

egression (noun)	egress (noun)
the act of coming (or going) out; becoming apparent	the act of coming (or going) out; becoming apparent
	(astronomy) the reappearance of a celestial body after an eclipse
	the becoming visible

egression (verb)	egress (verb)
	come out of