high-mindedness vs high-minded

high-mindedness is a noun but high-minded is not a noun.

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

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

high-mindedness (adjective)	high-minded (adjective)
	of high moral or intellectual value; elevated in nature or style