libertarianism vs ideology

libertarianism and ideology both are nouns.

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

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

libertarianism: an ideological belief in freedom of thought, speech and action
ideology: an orientation that characterizes the thinking of a group or nation

Other hypernyms of libertarianism include political orientation, political theory.

libertarianism (noun)	ideology (noun)
an ideological belief in freedom of thought, speech and action	an orientation that characterizes the thinking of a group or nation
	imaginary or visionary theorization