exit vs depart

exit is a noun but depart is not a noun.

Word	Noun	Adjective	Verb	Adverb
exit	Yes	No	Yes	No
depart	No	No	Yes	No

As verbs, depart is a hyponym of exit; that is, depart is a word with a more specific, narrower meaning than exit:

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

exit (verb)	depart (verb)
pass from physical life and lose all bodily attributes and functions necessary to sustain life	go away or leave
lose the lead	depart for someplace
move out of or depart from	wander from a direct or straight course
	move away from a place into another direction
	remove oneself from an association with or participation in
	be at variance with; be out of line with