step out vs exit

step out is not a noun while exit is a noun.

Word	Noun	Adjective	Verb	Adverb
step out	No	No	Yes	No
exit	Yes	No	Yes	No

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

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

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

step out (verb)	exit (verb)
go outside a room or building for a short period of time	pass from physical life and lose all bodily attributes and functions necessary to sustain life
	lose the lead
	move out of or depart from