Synonyms and related words :
activity, alacrity, animal spirits, animation, anxiety, anxiousness, appetite, ardor, avidity, avidness, breathless impatience, brio, briskness, capersomeness, cheerful readiness, coltishness, dash, eagerness, enthusiasm, esprit, exuberance, forwardness, friskiness, frolicsomeness, gaiety, gamesomeness, gayness, glow, gust, gusto, heartiness, impatience, impetuosity, impetus, joie de vivre, keen desire, keenness, life, liveliness, lustiness, mettle, oomph, perkiness, pertness, piss and vinegar, playfulness, promptness, quickness, readiness, robustness, rollicksomeness, rompishness, skittishness, spirit, spiritedness, spirits, sportiveness, sprightliness, verve, vigor, vim, vitality, vivacity, warmth, zest, zestfulness, zing, zip,