bawler vs roarer

bawler and roarer both are nouns.

Word	Noun	Adjective	Verb	Adverb
bawler	Yes	No	No	No
roarer	Yes	No	No	No

As nouns, bawler and roarer are synonyms defined as:

bawler and roarer: someone who communicates vocally in a very loud voice

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

bawler (noun)	roarer (noun)
someone who communicates vocally in a very loud voice	someone who communicates vocally in a very loud voice
a loud weeper