going vs expiration

going and expiration both are nouns.

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

As nouns, going and expiration are synonyms defined as:

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

going (noun)	expiration (noun)
advancing toward a goal	the act of expelling air from the lungs
the act of departing	euphemistic expressions for death
euphemistic expressions for death	a coming to an end of a contract period

going (adjective)	expiration (adjective)
in full operation