fascism vs ideology

fascism and ideology both are nouns.

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

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

fascism: a political theory advocating an authoritarian hierarchical government (as opposed to democracy or liberalism)
ideology: an orientation that characterizes the thinking of a group or nation

Other hypernyms of fascism include political orientation, political theory.

fascism (noun)	ideology (noun)
a political theory advocating an authoritarian hierarchical government (as opposed to democracy or liberalism)	an orientation that characterizes the thinking of a group or nation
	imaginary or visionary theorization