General:
* Cacophony: A harsh, discordant mixture of sounds.
* Din: A loud, confused noise.
* Racket: A loud, unpleasant noise.
* Uproar: A loud and confused noise, especially one caused by a crowd of people.
Specific Types:
* Bawl: A loud, harsh cry.
* Roar: A loud, deep, and prolonged sound.
* Clatter: A series of loud, sharp noises.
* Rumble: A low, continuous sound.
* Bang: A loud, sudden noise.
* Sizzle: A continuous hissing sound, often associated with heat.
* Thump: A dull, heavy sound.
Figurative:
* Bedlam: A state of wild uproar and confusion.
* Hubbub: A lively, confused noise.
Informal:
* Noise pollution: Excessive noise that is harmful or annoying.
* A ruckus: A noisy disturbance or commotion.
The best word will depend on the context and the specific type of noise you are describing.