federalism vs ideology

federalism and ideology both are nouns.

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

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

federalism: the idea of a federal organization of more or less self-governing units
ideology: an orientation that characterizes the thinking of a group or nation

Other hypernyms of federalism include political orientation, political theory.

federalism (noun)	ideology (noun)
the idea of a federal organization of more or less self-governing units	an orientation that characterizes the thinking of a group or nation
	imaginary or visionary theorization