peter out vs run down

peter out and run down both are verbs.

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

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

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

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

peter out (verb)	run down (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	injure or kill by knocking (someone or something) down and passing over the body, as with a vehicle
	pursue until captured
	move downward
	examine hastily
	deplete
	trace