righteous vs upright

righteous is not a noun while upright is a noun.

Word	Noun	Adjective	Verb	Adverb
righteous	No	Yes	No	No
upright	Yes	Yes	No	No

righteous (noun)	upright (noun)
	a piano with a vertical sounding board
	a vertical structural member as a post or stake

righteous (adjective)	upright (adjective)
characterized by or proceeding from accepted standards of morality or justice	upright in position or posture
morally justified	of moral excellence
	in a vertical position; not sloping