egress vs egression

egress and egression both are nouns.

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

As nouns, egress and egression are synonyms defined as:

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

Other synonyms of egress include emergence.

egress (noun)	egression (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

egress (verb)	egression (verb)
come out of