suppleness in WordNet English dictionary

1. the gracefulness of a person or animal that is flexible and supple
   lissomeness  litheness  suppleness 
   
2. adaptability of mind or character
   "he was valued for his reliability and pliability"; "he increased the leanness and suppleness of the organization"
   pliability  pliancy  pliantness  suppleness 
   
3. the property of being pliant and flexible
   pliancy  pliantness  suppleness