peter out vs discontinue

peter out and discontinue both are verbs.

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

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

peter out (verb)	discontinue (verb)
use up all one's strength and energy and stop working	prevent completion
end weakly	put an end to a state or an activity
	come to or be at an end