pass away vs exit

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

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

As verbs, pass away and exit are synonyms defined as:

pass away and exit: pass from physical life and lose all bodily attributes and functions necessary to sustain life

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

pass away (verb)	exit (verb)
pass from physical life and lose all bodily attributes and functions necessary to sustain life	pass from physical life and lose all bodily attributes and functions necessary to sustain life
go out of existence	lose the lead
	move out of or depart from