erectile vs upright

erectile is not a noun while upright is a noun.

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

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

erectile (adjective)	upright (adjective)
capable of being raised to an upright position	upright in position or posture
filled with vascular sinuses and capable of becoming distended and rigid as the result of being filled with blood	of moral excellence
	in a vertical position; not sloping