activeness vs behavior

activeness and behavior both are nouns.

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

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

activeness: the state of being active
behavior: the action or reaction of something (as a machine or substance) under specified circumstances

Other hyponyms of activeness include agency, busyness, hum, behaviour, eructation, eruption, extravasation, operation, overdrive, play, swing.

activeness (noun)	behavior (noun)
the trait of being active; moving or acting rapidly and energetically	manner of acting or controlling yourself
the state of being active	(psychology) the aggregate of the responses or reactions or movements made by an organism in any situation
	(behavioral attributes) the way a person behaves toward other people
	the action or reaction of something (as a machine or substance) under specified circumstances