boo vs shout

boo and shout both are nouns.

Word	Noun	Adjective	Verb	Adverb
boo	Yes	No	Yes	No
shout	Yes	No	Yes	No

As nouns, shout is a hypernym of boo; that is, shout is a word with a broader meaning than boo:

Other hypernyms of boo include call, cry, outcry, vociferation, yell.

boo (noun)	shout (noun)
a cry or noise made to express displeasure or contempt	a loud utterance; often in protest or opposition

boo (verb)	shout (verb)
show displeasure, as after a performance or speech	utter in a loud voice; talk in a loud voice (usually denoting characteristic manner of speaking)
	utter a sudden loud cry
	utter aloud; often with surprise, horror, or joy
	use foul or abusive language towards