expiration vs death

expiration and death both are nouns.

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

As nouns, death is a hypernym of expiration; that is, death is a word with a broader meaning than expiration:

Other hypernyms of expiration include decease, expiry.

expiration (noun)	death (noun)
the act of expelling air from the lungs	the act of killing
euphemistic expressions for death	the event of dying or departure from life
a coming to an end of a contract period	the permanent end of all life functions in an organism or part of an organism
	the absence of life or state of being dead
	a final state
	the time when something ends
	the time at which life ends; continuing until dead