WordNet (r) 3.0 (2006):

musicality
    n 1: the property of sounding like music [syn: musicality,
         musicalness]

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "musicality":
   dulcetness, ear for music, harmonics, harmony, mellifluence,
   mellifluousness, melodics, melodiousness, melody, music,
   music theory, musical ear, musical quality, musical sense,
   musical sound, musical talent, musicianship, musicography,
   musicology, perfect pitch, relative pitch, rhythmics,
   sense of rhythm, sweetness, theory, tonality, tone, tune,
   tunefulness, virtuosity