upright vs fastigiate

upright is a noun but fastigiate is not a noun.

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

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

upright (adjective)	fastigiate (adjective)
upright in position or posture	having clusters of erect branches (often appearing to form a single column)
of moral excellence
in a vertical position; not sloping