exit vs expiration

exit and expiration both are nouns.

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

As nouns, exit and expiration are synonyms defined as:

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

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

exit (verb)	expiration (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