Mob : a large crowd of people, especially one that is disorderly and intent on causing trouble or violence.Noise : a sound, especially one that is loud or unpleasant or that causes disturbance.Roar : a full, deep, prolonged cry uttered by a lion or other large wild animal.Rubbish : waste material; refuse or litter.Rabble : a disorderly crowd; a mob.Synonym of Rabble is Mob