upright vs rampant

upright is a noun but rampant is not a noun.

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

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

upright (adjective)	rampant (adjective)
upright in position or posture	(of a plant) having a lush and unchecked growth
of moral excellence	rearing on left hind leg with forelegs elevated and head usually in profile
in a vertical position; not sloping	unrestrained and violent