yeller vs shouter

yeller and shouter both are nouns.

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

As nouns, yeller and shouter are synonyms defined as:

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

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

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