activeness vs agency

activeness and agency both are nouns.

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

As nouns, agency is a hyponym of activeness; that is, agency is a word with a more specific, narrower meaning than activeness:

activeness (noun)	agency (noun)
the trait of being active; moving or acting rapidly and energetically	to have the ability to produce a particular effect or achieve an end
the state of being active	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