upright vs righteous

upright is a noun but righteous is not a noun.

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

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

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