monarchism vs ideology

monarchism and ideology both are nouns.

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

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

monarchism: a belief in and advocacy of monarchy as a political system
ideology: an orientation that characterizes the thinking of a group or nation

Other hypernyms of monarchism include political orientation, political theory.

monarchism (noun)	ideology (noun)
a belief in and advocacy of monarchy as a political system	an orientation that characterizes the thinking of a group or nation
	imaginary or visionary theorization