WordNet (r) 3.0 (2006):

pizzazz
    n 1: the activeness of an energetic personality [syn:
         dynamism, pizzazz, pizzaz, oomph, zing]

Moby Thesaurus II by Grady Ward, 1.0:

99 Moby Thesaurus words for "pizzazz":
   aggressiveness, amperage, animation, armipotence, authority, bang,
   beef, black power, breeziness, briskness, brute force, bubbliness,
   charge, charisma, clout, cogence, cogency, compulsion, dash, dint,
   drive, duress, ebullience, effect, effectiveness, effectuality,
   effervescence, energy, enterprise, fire, flower power, force,
   force majeure, forcefulness, full blast, full force, get-up-and-go,
   ginger, influence, initiative, kick, life, liveliness, main force,
   main strength, mana, might, might and main, mightiness, moxie,
   muscle power, pep, pepper, peppiness, piss and vinegar, poop,
   potence, potency, potentiality, power, power pack, power structure,
   power struggle, powerfulness, prepotency, productiveness,
   productivity, puissance, pull, punch, push, sinew, snap, spirit,
   spiritedness, sprightliness, spunk, starch, steam, strength,
   strong arm, superiority, superpower, thrust, validity, vehemence,
   verve, vigor, vim, virility, virtue, virulence, vitality,
   vivaciousness, vivacity, wattage, weight, zing, zip