a loud, confused noise, especially one caused by a large mass of people.
Merriam-Webster Online Dictionary
tumult (noun)1.
a) disorderly agitation or milling about of a crowd usually with uproar and confusion of voices - commotion
b) a turbulent uprising - riot
2.
- hubbub din
3.
a) violent agitation of mind or feelings
b) a violent outburst