riot

noun

1.
a public act of violence by an unruly mob
public violence
Derived from:
riot riotous
2.
a state of disorder involving group violence
rioting
Derived from:
riot
3.
4.
a wild gathering involving excessive drinking and promiscuity
bacchanal bacchanalia debauch debauchery drunken revelry orgy saturnalia
Derived from:
riot riotous