rampant vs upright

rampant is not a noun while upright is a noun.

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

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

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