vertical vs fastigiate

vertical is a noun but fastigiate is not a noun.

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

vertical (noun)	fastigiate (noun)
a vertical structural member as a post or stake
something that is oriented vertically

vertical (adjective)	fastigiate (adjective)
at right angles to the plane of the horizon or a base line	having clusters of erect branches (often appearing to form a single column)
upright in position or posture
relating to or involving all stages of a business from production to distribution
of or relating to different levels in a hierarchy (as levels of social class or income group)