quixotism vs idealism

quixotism and idealism both are nouns.

Word	Noun	Adjective	Verb	Adverb
quixotism	Yes	No	No	No
idealism	Yes	No	No	No

As nouns, idealism is a hypernym of quixotism; that is, idealism is a word with a broader meaning than quixotism:

quixotism: quixotic (romantic and impractical) behavior
idealism: impracticality by virtue of thinking of things in their ideal form rather than as they really are

quixotism (noun)	idealism (noun)
quixotic (romantic and impractical) behavior	impracticality by virtue of thinking of things in their ideal form rather than as they really are
	elevated ideals or conduct; the quality of believing that ideals should be pursued
	(philosophy) the philosophical theory that ideas are the only reality