nobleness vs idealism

nobleness and idealism both are nouns.

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

As nouns, idealism is a hyponym of nobleness; that is, idealism is a word with a more specific, narrower meaning than nobleness:

nobleness: the quality of elevation of mind and exaltation of character or ideals or conduct
idealism: elevated ideals or conduct; the quality of believing that ideals should be pursued

Other hyponyms of nobleness include high-mindedness, noble-mindedness, sublimity.

nobleness (noun)	idealism (noun)
the quality of elevation of mind and exaltation of character or ideals or conduct	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