high-mindedness vs idealism

high-mindedness and idealism both are nouns.

Word	Noun	Adjective	Verb	Adverb
high-mindedness	Yes	No	No	No
idealism	Yes	No	No	No

As nouns, high-mindedness and idealism are synonyms defined as:

high-mindedness and idealism: elevated ideals or conduct; the quality of believing that ideals should be pursued

Other synonyms of high-mindedness include noble-mindedness.

high-mindedness (noun)	idealism (noun)
elevated ideals or conduct; the quality of believing that ideals should be pursued	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