overflow vs run out

overflow is a noun but run out is not a noun.

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

As verbs, run out is a hypernym of overflow; that is, run out is a word with a broader meaning than overflow:

Other hypernyms of overflow include spill.

overflow (noun)	run out (noun)
a large flow
the occurrence of surplus liquid (as water) exceeding the limit or capacity

overflow (verb)	run out (verb)
overflow with a certain feeling	use up all one's strength and energy and stop working
flow or run over (a limit or brim)	prove insufficient
	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