The Collaborative International Dictionary of English v.0.48:

Potentiality \Po*ten`ti*al"i*ty\, n.
   The quality or state of being potential; possibility, not
   actuality; inherent capability or disposition, not actually
   exhibited.
   [1913 Webster]

WordNet (r) 3.0 (2006):

potentiality
    n 1: the inherent capacity for coming into being [syn:
         potential, potentiality, potency]
    2: an aptitude that may be developed [syn: capability,
       capableness, potentiality] [ant: incapability,
       incapableness]

Moby Thesaurus II by Grady Ward, 1.0:

103 Moby Thesaurus words for "potentiality":
   amperage, armipotence, authority, bare possibility, beef,
   black power, brute force, chance, charge, charisma, clout, cogence,
   cogency, compulsion, conceivability, conceivableness, contingency,
   delitescence, dint, dormancy, drive, duress, effect, effectiveness,
   effectuality, energy, even chance, eventuality, flower power,
   force, force majeure, forcefulness, full blast, full force,
   good chance, good possibility, hope, influence, latency,
   latent content, latent meaningfulness, latentness, likelihood,
   main force, main strength, mana, might, might and main, mightiness,
   moxie, muscle power, off chance, outside chance, outside hope,
   pizzazz, poop, possibilities, possibility, possibleness, potence,
   potency, potential, power, power pack, power structure,
   power struggle, powerfulness, prepotency, probability,
   productiveness, productivity, prospect, puissance, pull, punch,
   push, remote possibility, sinew, small hope, steam, strength,
   strong arm, superiority, superpower, the attainable, the feasible,
   the possible, thinkability, thinkableness, validity, vehemence,
   vigor, vim, virility, virtuality, virtue, virulence, vitality,
   wattage, weight, what is possible, what may be, what might be