Tyranny
Part of speech: noun
Definition: A government in which a single ruler (a tyrant) has absolute power. The office or jurisdiction of an absolute ruler. Absolute power, or its use. Extreme severity or rigour.
Example sentence: Beauty is a short-lived tyranny.
Absolutism
Part of speech: noun
Definition: The state of being absolute; the system or doctrine of the absolute; the principles or practice of absolute or arbitrary government; despotism.Doctrine of absolute decrees. - Ash
Example sentence: Philosophically, I believe that libertarianism - and the wider creed of sound individualism of which libertarianism is a part - must rest on absolutism and deny relativism.