1) Bawler 2) Bellower 3) Boisterous laughter 4) Clamorous one 5) Communicator 6) Felis leo, at times 7) Hungry lion 8) Lion 9) Lion at times 10) Lion for one 11) Lion or tiger or bear 12) Loud laugher 13) Loud lion 14) Loud-voiced one 15) One guffawing 16) Screamer 17) Screecher 18) Shouter 19) Thunderer Found on https://www.crosswordclues.com/clue/roarer
• (n.) A horse subject to roaring. See Roaring, 2. • (n.) A riotous fellow; a roaring boy. • (n.) The barn owl. • (n.) One who, or that which, roars. Found on http://thinkexist.com/dictionary/meaning/roarer/
Roar'er noun 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.) A horse subject to roaring. See Roaring , 2. 2. (Zoolog... Found on http://www.encyclo.co.uk/webster/R/87