expiration vs termination

expiration and termination both are nouns.

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

As nouns, expiration and termination are synonyms defined as:

Other synonyms of expiration include expiry.

expiration (noun)	termination (noun)
the act of expelling air from the lungs	the act of ending something
euphemistic expressions for death	the end of a word (a suffix or inflectional ending or final morpheme)
a coming to an end of a contract period	something that results
	a place where something ends or is complete
	a coming to an end of a contract period