expiration vs going

expiration and going both are nouns.

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

As nouns, expiration and going are synonyms defined as:

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

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

expiration (adjective)	going (adjective)
	in full operation