screeching vs vociferation

screeching and vociferation both are nouns.

Word	Noun	Adjective	Verb	Adverb
screeching	Yes	No	No	No
vociferation	Yes	No	No	No

As nouns, vociferation is a hypernym of screeching; that is, vociferation is a word with a broader meaning than screeching:

Other hypernyms of screeching include call, cry, outcry, shout, yell.

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