totalitarianism vs ideology

totalitarianism and ideology both are nouns.

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

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

totalitarianism: an ideological belief in the complete and unrestricted power of government.
ideology: an orientation that characterizes the thinking of a group or nation

Other hypernyms of totalitarianism include political orientation, political theory.

totalitarianism (noun)	ideology (noun)
an ideological belief in the complete and unrestricted power of government.	an orientation that characterizes the thinking of a group or nation
a form of government in which the ruler is an absolute dictator (not restricted by a constitution or laws or opposition etc.)	imaginary or visionary theorization