Monarchy
Part of speech: noun
Definition: A government with a hereditary head of state (whether as a figurehead or as a powerful ruler).
Example sentence: The best Governments of the World have bin composed of Monarchy, Aristocracy, and Democracy.
Autocracy
Part of speech: noun
Definition: A form of government in which unlimited power is held by a single individual.
Example sentence: Autocracy is a government of the few from above; Bolshevism is a government of the few from below.