peter out vs conk out

peter out and conk out both are verbs.

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

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

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

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

peter out (verb)	conk 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	stop operating or functioning