tunefulness

from WordNet (r) 3.0 (2006)

tunefulness
    n 1: the property of having a melody [syn: {melodiousness},
         {tunefulness}]

from The Collaborative International Dictionary of English v.0.48

Tuneful \Tune"ful\ (-f[.u]l), a.
   Harmonious; melodious; musical; as, tuneful notes. " Tuneful
   birds." --Milton. -- {Tune"ful*ly}, adv. -- {Tune"ful*ness},
   n.
   [1913 Webster]