1. A form of government in which the supreme power is placed in a few hands; a state so governed.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• oligarky,
• oligarchys,
• oliargchy,
• oligarcy,
• oilgarchy,
• oligargy,
• ologarchy,
• orligarchy,
• diaarchy,
• oligarch,
• oligarchi,
• oligachy,
• oligrachy,
• chilarchy,
• ologarchal,
• oligarchal,
• oligarchie,
• whigarchy,
• oligarche,
• ollgarchyc

• oligarchical,
• oligarchic,
• oligarch.

The adjective form of the word "oligarchy" is "oligarchic".

The plural of the "oligarchy" can be the "oligarchies".

The singular of the "oligarchy" can be the "oligarchy".