screecher vs yeller

screecher and yeller both are nouns.

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

As nouns, screecher and yeller are synonyms defined as:

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

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

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