pandemonium
noun
we heard a massive bang and then there was complete pandemonium:
bedlam, chaos, mayhem, uproar, madness, havoc, turmoil, tumult, commotion, confusion, disorder, anarchy, furor, frenzy, clamor, din, hubbub, hue and cry, babel, rumpus, fracas, hurly-burly, maelstrom;
West Indian bangarang;
informal hullabaloo, all hell breaking loose, madhouse.
▷antonyms silence, peace.