pipe up vs shout

pipe up is not a noun while shout is a noun.

Word	Noun	Adjective	Verb	Adverb
pipe up	No	No	Yes	No
shout	Yes	No	Yes	No

As verbs, shout is a hypernym of pipe up; that is, shout is a word with a broader meaning than pipe up:

Other hypernyms of pipe up include call, cry, holler, hollo, scream, shout out, squall, yell.

pipe up (noun)	shout (noun)
	a loud utterance; often in protest or opposition

pipe up (verb)	shout (verb)
begin to play or sing	utter in a loud voice; talk in a loud voice (usually denoting characteristic manner of speaking)
utter a shrill cry	utter a sudden loud cry
	utter aloud; often with surprise, horror, or joy
	use foul or abusive language towards