roar, howl -- (make a loud noise, as of wind, water, or vehicles; "The wind was howling in the trees"; "The water roared down the chute")
thunder, roar -- (utter words loudly and forcefully; "`Get out of here,' he roared")
howl, ululate, wail, roar, yawl, yaup -- (emit long loud cries; "wail in self-pity"; "howl with sorrow")
roar -- (act or proceed in a riotous, turbulent, or disorderly way; "desperadoes from the hills regularly roared in to take over the town"-R.A.Billington)
bellow, roar -- (make a loud noise, as of animal; "The bull bellowed")
booming, flourishing, palmy, prospering, prosperous, roaring, thriving -- (very lively and profitable; "flourishing businesses"; "a palmy time for stockbrokers"; "a prosperous new business"; "doing a roaring trade"; "a thriving tourist center"; "did a thriving business in orchids")