agential vs agency

agential is not a noun while agency is a noun.

Word	Noun	Adjective	Verb	Adverb
agential	No	Yes	No	No
agency	Yes	No	No	No

agential (noun)	agency (noun)
	to have the ability to produce a particular effect or achieve an end
	an administrative unit of government
	a business or organization that provides a particular service, especially the mediation of transactions between two parties
	the state of serving as an official and authorized delegate or agent
	the state of being in action or exerting power

agential (adjective)	agency (adjective)
of or relating to an agent or agency