agency vs agent

agency and agent both are nouns.

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

agency (noun)	agent (noun)
to have the ability to produce a particular effect or achieve an end	the semantic role of the animate entity that instigates or causes the happening denoted by the verb in the clause
an administrative unit of government	an active and efficient cause; capable of producing a certain effect
a business or organization that provides a particular service, especially the mediation of transactions between two parties	a businessman who buys or sells for another in exchange for a commission
the state of serving as an official and authorized delegate or agent	a representative who acts on behalf of other persons or organizations
the state of being in action or exerting power	any agent or representative of a federal agency or bureau
	a substance that exerts some force or effect