autocracy vs ideology

autocracy and ideology both are nouns.

Word	Noun	Adjective	Verb	Adverb
autocracy	Yes	No	No	No
ideology	Yes	No	No	No

As nouns, ideology is a hypernym of autocracy; that is, ideology is a word with a broader meaning than autocracy:

autocracy: a political theory favoring unlimited authority by a single individual
ideology: an orientation that characterizes the thinking of a group or nation

Other hypernyms of autocracy include political orientation, political theory.

autocracy (noun)	ideology (noun)
a political theory favoring unlimited authority by a single individual	an orientation that characterizes the thinking of a group or nation
a political system governed by a single individual	imaginary or visionary theorization