tyranny vs autarchy

tyranny and autarchy both are nouns.

Word	Noun	Adjective	Verb	Adverb
tyranny	Yes	No	No	No
autarchy	Yes	No	No	No

As nouns, autarchy is a hypernym of tyranny; that is, autarchy is a word with a broader meaning than tyranny:

tyranny: a form of government in which the ruler is an absolute dictator (not restricted by a constitution or laws or opposition etc.)
autarchy: a political system governed by a single individual

Other hypernyms of tyranny include autocracy.

tyranny (noun)	autarchy (noun)
a form of government in which the ruler is an absolute dictator (not restricted by a constitution or laws or opposition etc.)	a political system governed by a single individual
dominance through threat of punishment and violence	economic independence as a national policy