bellower vs yeller

bellower and yeller both are nouns.

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

As nouns, bellower and yeller are synonyms defined as:

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

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

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