roar - noun

a deep prolonged loud noise

a very loud utterance (like the sound of an animal)

the sound made by a lion

roar - verb

• 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

roar - thesaurus

bellow   bellowing   boom   holla   holler   hollering   hollo   holloa   howl   roaring   thunder   ululate   wail   yaup   yawl   yowl