noun (n)

• the gracefulness of a person or animal that is quick and nimble(noun.attribute)

  Synonym:
  legerity, lightness, lightsomeness, nimbleness
  

  source: wordnet30
• The quality of being agile; the power of moving the limbs quickly and easily; nimbleness; activity; quickness of motion; as, strength and agility of body.(noun)

  source: webster1913