go forth vs egress

go forth is not a noun while egress is a noun.

Word	Noun	Adjective	Verb	Adverb
go forth	No	No	Yes	No
egress	Yes	No	Yes	No

As verbs, go forth and egress are synonyms defined as:

Other synonyms of go forth include come forth, come out, emerge, issue.

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

go forth (verb)	egress (verb)
come out of	come out of
go away from a place