screecher vs shouter

screecher and shouter both are nouns.

Word	Noun	Adjective	Verb	Adverb
screecher	Yes	No	No	No
shouter	Yes	No	No	No

As nouns, screecher and shouter are synonyms defined as:

screecher and shouter: someone who communicates vocally in a very loud voice

Other synonyms of screecher include bawler, bellower, roarer, screamer, yeller.

screecher (noun)	shouter (noun)
someone who communicates vocally in a very loud voice	someone who communicates vocally in a very loud voice