screak vs shout

screak is not a noun while shout is a noun.

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

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

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

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

screak (verb)	shout (verb)
utter a harsh abrupt scream	utter in a loud voice; talk in a loud voice (usually denoting characteristic manner of speaking)
make a high-pitched, screeching noise	utter a sudden loud cry
	utter aloud; often with surprise, horror, or joy
	use foul or abusive language towards