ROARER
roarer, bawler, bellower, screamer, screecher, shouter, yeller
(noun) someone who communicates vocally in a very loud voice
Source: WordNet® 3.1
Etymology
Noun
roarer (plural roarers)
One who roars.
(archaic) One of a group of young men who would carouse in taverns, then pick brawls on the street for entertainment.
Synonyms
• (young man who picks brawls): roaring boy
Source: Wiktionary
Roar"er, n.
1. One who, or that which, roars. Specifically:
(a) A riotous fellow; a roaring boy.
A lady to turn roarer, and break glasses. Massinger.
(b) (Far.)
Definition: A horse subject to roaring. See Roaring, 2.
2. (Zoöl.)
Definition: The barn owl. [Prov.Eng.]
Source: Webster’s Unabridged Dictionary 1913 Edition