roar

(noun) a deep prolonged loud noise. Synonyms: boom, roaring, thunder.

(noun) a very loud utterance (like the sound of an animal). Synonyms: bellow, bellowing, holla, holler, hollering, hollo, holloa, roaring, yowl. Example: "His bellow filled the hallway."

(noun) the sound made by a lion.

(verb) make a loud noise, as of wind, water, or vehicles. Synonyms: howl. Examples: "The wind was howling in the trees." "The water roared down the chute."

(verb) utter words loudly and forcefully. Synonyms: thunder. Example: "`get out of here,' he roared."

(verb) emit long loud cries. Synonyms: howl, ululate, wail, yawl, yaup. Examples: "Wail in self-pity." "Howl with sorrow."

(verb) act or proceed in a riotous, turbulent, or disorderly way. Example: "Desperadoes from the hills regularly roared in to take over the town"-r.a.billington."

(verb) make a loud noise, as of animal. Synonyms: bellow. Example: "The bull bellowed."

(verb) laugh unrestrainedly and heartily. Synonyms: howl.