
1) Ablaze 2) Bellow 3) Bellowing 4) Boom 5) Booming 6) Burning 7) Deafening 8) Earsplitting 9) Holla 10) Holler 11) Hollering 12) Hollo 13) Holloa 14) Loud 15) Palmy 16) Prospering 17) Roar 18) Successful 19) Thriving 20) Thunder 21) Thunderous 22) Thundery 23) Yowl
Found on
https://www.crosswordclues.com/clue/roaring

1) Booming 2) Extremely 3) Flourishing 4) Like some surf and crowds 5) Like the twenties 6) Palmy 7) Prospering 8) Prosperous 9) Sound from the Big Top 10) Successful 11) Thriving 12) Very lively and profitable 13) Word with Camp or Twenties
Found on
https://www.crosswordclues.com/clue/roaring

- a deep prolonged loud noise
- a very loud utterance (like the sound of an animal)
- make a loud noise, as of wind, water, or vehicles
- utter words loudly and forcefully
- emit long loud cries
- act or proceed in a riotous, turbulent, or disorderly way
- make a loud noise, as of animal
- laugh unrestrainedly and heartily
Found on

• (p. pr. & vvb. n.) of Roar • (n.) An affection of the windpipe of a horse, causing a loud, peculiar noise in breathing under exertion; the making of the noise so caused. See Roar, v. i., 5. • (n.) A loud, deep, prolonged sound, as of a large beast, or of a person in distress, anger, mirth, etc., or of a noisy congregation.Roaring: ...
Found on
http://thinkexist.com/dictionary/meaning/roaring/
Roar'ing noun 1. A loud, deep, prolonged sound, as of a large beast, or of a person in distress, anger, mirth, etc., or of a noisy congregation.
2. (Far.) An affection of the windpipe of a horse, causing a loud, peculiar noise in breathing under exertion; the making of the noise s...
Found on
http://www.encyclo.co.uk/webster/R/87

A breathing disorder
Found on
http://www.gaitedhorses.net/Articles/HorseGlossary.html

Roaring is British slang for very drunk, intoxicated.
Found on
http://www.probertencyclopaedia.com/browse/ZR.HTM

Common name for laryngeal hemiplegia.
Found on
http://www.thehorse.com/Glossary.xhtml?L=R

[
adv] - extremely
Found on
http://www.webdictionary.co.uk/definition.php?query=roaring
adverb extremely; `roaring drunk`
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.