Alliance
Assembly
Brotherhood
Cabal
Carnival
Celebration
Conclave
Confederacy
Conglomerate
Congregation
Congress
Conspiracy
Convening
Convent
Convention
Convocation
Council
Coven
Fair
Federation
Festival
Fraternity
Gathering
Guild
Junta
League
March
Meeting
Order
Parade
Procession
Rally
Rallying
Sect
Society
Summit
Syndicate