peter out vs run out

peter out and run out both are verbs.

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

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

peter out and run out: use up all one's strength and energy and stop working

Other synonyms of peter out include conk out, poop out, run down.

peter out (verb)	run out (verb)
use up all one's strength and energy and stop working	use up all one's strength and energy and stop working
end weakly	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