The Collaborative International Dictionary of English v.0.48:

Pliability \Pli`a*bil"i*ty\, n.
   The quality or state of being pliable; flexibility; as,
   pliability of disposition. "Pliability of movement." --Sir W.
   Scott.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pliability
    n 1: the property of being easily bent without breaking [syn:
         bendability, pliability]
    2: adaptability of mind or character; "he was valued for his
       reliability and pliability"; "he increased the leanness and
       suppleness of the organization" [syn: pliability,
       pliancy, pliantness, suppleness]

Moby Thesaurus II by Grady Ward, 1.0:

105 Moby Thesaurus words for "pliability":
   abulia, acquiescence, adaptability, agreeability, agreeableness,
   alacrity, amenability, aptitude, aptness, ardor, bendability,
   biddability, brightness, cheerful consent, cleverness,
   compliableness, compliance, consent, convenience, cooperativeness,
   cowardice, docility, ductibility, ductility, eagerness,
   educability, elasticity, enthusiasm, extendibility, extensibility,
   facility, faintheartedness, faintness, favorable disposition,
   favorableness, fear, feasibility, feeblemindedness, feebleness,
   fictility, flexibility, flexility, flexuousness, formativeness,
   forwardness, frailty, gameness, give, goodwill, handiness,
   impressionability, infirmity, intelligence, limberness, litheness,
   malleability, manageability, manageableness, maneuverability,
   moldability, motivation, plasticity, pliancy, practicality,
   promptness, quickness, readiness, receptive mood, receptiveness,
   receptivity, responsiveness, right mood, sensibility,
   sensitiveness, sequacity, servility, spinelessness, springiness,
   submissiveness, subservience, suppleness, susceptibility,
   teachability, teachableness, tensileness, tensility, tractability,
   tractility, trainableness, ungrudgingness, unloathness,
   unreluctance, untroublesomeness, weak will, weak-mindedness,
   weakness, wieldableness, wieldiness, willing ear, willing heart,
   willingness, willowiness, yieldingness, zeal, zealousness