shriek vs outcry

shriek and outcry both are nouns.

Word	Noun	Adjective	Verb	Adverb
shriek	Yes	No	Yes	No
outcry	Yes	No	Yes	No

As nouns, outcry is a hypernym of shriek; that is, outcry is a word with a broader meaning than shriek:

Other hypernyms of shriek include call, cry, shout, vociferation, yell.

shriek (noun)	outcry (noun)
sharp piercing cry	a loud utterance; often in protest or opposition
a high-pitched noise resembling a human cry

shriek (verb)	outcry (verb)
utter a shrill cry	utter aloud; often with surprise, horror, or joy
	shout louder than