Tyranny

tyr·an·ny/ˈtɪr ə ni


noun, plural tyr·an·nies.

1. arbitrary or unrestrained exercise of power; despotic abuse of authority.

2. the government or rule of a tyrant or absolute ruler.

3. a state ruled by a tyrant or absolute ruler.

4. oppressive or unjustly severe government on the part of any ruler.

5. undue severity or harshness.

courtesy http://dictionary.reference.com/browse/tyranny