Synonyms and related words :
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