expire vs run out

expire and run out both are verbs.

Word	Noun	Adjective	Verb	Adverb
expire	No	No	Yes	No
run out	No	No	Yes	No

As verbs, expire and run out are synonyms defined as:

expire (verb)	run out (verb)
expel air	use up all one's strength and energy and stop working
pass from physical life and lose all bodily attributes and functions necessary to sustain life	prove insufficient
lose validity	exhaust the supply of
	become used up; be exhausted
	flow, run or fall out and become lost
	flow off gradually
	leave suddenly and as if in a hurry
	lose validity