upright vs erectile

upright is a noun but erectile is not a noun.

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

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

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