screech vs scream

screech and scream both are nouns.

Word	Noun	Adjective	Verb	Adverb
screech	Yes	No	Yes	No
scream	Yes	No	Yes	No

As nouns, screech and scream are synonyms defined as:

Other synonyms of screech include screaming, screeching, shriek, shrieking.

As nouns, screech and scream are synonyms defined as:

Other synonyms of screech include screaming, screeching, shriek, shrieking.

As verbs, scream is a hypernym of screech; that is, scream is a word with a broader meaning than screech:

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

screech (noun)	scream (noun)
sharp piercing cry	sharp piercing cry
a high-pitched noise resembling a human cry	a joke that seems extremely funny
	a high-pitched noise resembling a human cry

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