run out vs expire

run out and expire both are verbs.

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

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

run out (verb)	expire (verb)
use up all one's strength and energy and stop working	expel air
prove insufficient	pass from physical life and lose all bodily attributes and functions necessary to sustain life
exhaust the supply of	lose validity
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