busyness

Noun

bus=y=ness

WORDNET DICTIONARY

busyness(n = noun.state) hum - the state of being or appearing to be actively engaged in an activity; "they manifested all the busyness of a pack of beavers"; "there is a constant hum of military preparation"

is a kind of action, activeness, activity

Derived forms adjective busy₄, adjective busy₁, adjective busy₅

busyness, n.

the state of being or appearing to be actively engaged in an activity; as, they manifested all the busyness of a pack of beavers. [WordNet 1.5]

For further exploring for "busyness" in Webster Dictionary Online