Tyrannical
Part of speech: adjective
Definition: Of, or relating to tyranny or a tyrant. Despotic, oppressive or authoritarian.
Example sentence: Majorities, as such, afford no guarantees for justice. They are men of the same nature as minorities. They have the same passions for fame, power, and money, as minorities; and are liable and likely to be equally - perhaps more than equally, because more boldly - rapacious, tyrannical and unprincipled, if intrusted with power.
Autocracy
Part of speech: noun
Definition: A form of government in which unlimited power is held by a single individual.
Example sentence: I was interested by the idea that artists working in a totalitarian dictatorship or tsarist autocracy are secretly and slightly shamefully envied by artists who work in freedom. They have the gratification of intense interest: the authorities want to put them in jail, while there are younger readers for whom what they write is pure oxygen.