shouter vs bellower

shouter and bellower both are nouns.

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

As nouns, shouter and bellower are synonyms defined as:

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

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

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