go away vs exit

go away is not a noun while exit is a noun.

Word	Noun	Adjective	Verb	Adverb
go away	No	No	Yes	No
exit	Yes	No	Yes	No

As verbs, exit is a hypernym of go away; that is, exit is a word with a broader meaning than go away:

Other hypernyms of go away include get out, go out, leave.

go away (noun)	exit (noun)
	the act of going out
	an opening that permits escape or release
	euphemistic expressions for death

go away (verb)	exit (verb)
get lost, as without warning or explanation	pass from physical life and lose all bodily attributes and functions necessary to sustain life
go away from a place	lose the lead
move away from a place into another direction	move out of or depart from
become invisible or unnoticeable