passant vs vertical

passant is not a noun while vertical is a noun.

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

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

passant (adjective)	vertical (adjective)
in walking position with right foreleg raised	at right angles to the plane of the horizon or a base line
	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)