upright vs perpendicular

upright and perpendicular both are nouns.

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

upright (noun)	perpendicular (noun)
a piano with a vertical sounding board	an extremely steep face
a vertical structural member as a post or stake	a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point
	a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting
	a straight line at right angles to another line

upright (adjective)	perpendicular (adjective)
upright in position or posture	intersecting at or forming right angles
of moral excellence	at right angles to the plane of the horizon or a base line
in a vertical position; not sloping	so steep as to be nearly vertical