violence,
force an act of aggression (as one against a person who resists); "he may accomplish by craft in the long run what he cannot do by force and violence in the short one"
riot -
a wild gathering involving excessive drinking and promiscuity
A riot is a form of civil disorder characterized often by disorganized groups lashing out in a sudden and intense rash of violence against authority, property or people. While individuals may attempt to lead or control a riot, riots are typically chaotic and exhibit herd behavior, and usually generated by civil unrest. Riots often occur in reaction to a perceived grievance or out of dissent.
OmegaWiki Dictionary
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riot A wild gathering involving excessive drinking and promiscuity.
