expiration vs exit

expiration and exit both are nouns.

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

As nouns, expiration and exit are synonyms defined as:

Other synonyms of expiration include departure, going, loss, passing, release.

expiration (noun)	exit (noun)
the act of expelling air from the lungs	the act of going out
euphemistic expressions for death	an opening that permits escape or release
a coming to an end of a contract period	euphemistic expressions for death

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