(n.) The doctrine of Leibnitz, that all substance involves force.

adventuresomeness adventurousness aggression aggressiveness ambitiousness demonic energy drive energy enterprise enterprisingness ergal force forcefulness get-up-and-get get-up-and-go getup go go-ahead go-getting go-to-itiveness gumption hustle initiative intensity kinetic energy liveliness pep potency potential energy power push pushfulness pushiness pushingness spirit spiritedness spunk strength strenuousness up-and-comingness venturesomeness venturousness vigor vitality zip