screak vs yell

screak is not a noun while yell is a noun.

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

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

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

screak (noun)	yell (noun)
	a loud utterance; often in protest or opposition
	a loud utterance of emotion (especially when inarticulate)

screak (verb)	yell (verb)
utter a harsh abrupt scream	utter or declare in a very loud voice
make a high-pitched, screeching noise	utter a sudden loud cry