Synonyms for Suppleness (same or very similar meaning)
WordNet sense 1 (the property of being pliant and flexible):
pliancy, pliantnessWordNet sense 2 (the gracefulness of a person or animal that is flexible and supple):
litheness, lissomenessWordNet sense 3 (adaptability of mind or character):
pliabilityFrom the ODE community, based on WordNetadd/edit