Castrophony

Then there came a sound, distant at first, that grew into a castrophony so immense, That it could be heard far away in space.

Source: wiktionary

I went some paces further into the citadel, and then, as though in a fearful dream, people were running past me, breathless and wild-eyed, and the nearer I drew, the greater the castrophony that boomed from the palace courtyard up ahead.

Source: wiktionary