The Collaborative International Dictionary of English v.0.48:

Joviality \Jo`vi*al"i*ty\, n. [Cf. F. jovialit['e].]
   The quality or state of being jovial. --Sir T. Herbert.
   [1913 Webster]

WordNet (r) 3.0 (2006):

joviality
    n 1: feeling jolly and jovial and full of good humor [syn:
         jollity, jolliness, joviality]
    2: a jovial nature [syn: conviviality, joviality]

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "joviality":
   amusement, cheer, conviviality, festivity, frivolity, fun, gaiety,
   glee, gleefulness, good cheer, heartiness, high glee,
   hilariousness, hilarity, holiday-making, hoopla, jocularity,
   jocundity, jollification, jolliness, jollity, joy, joyfulness,
   joyousness, larking, laughter, levity, mafficking, merriment,
   merriness, merrymaking, mirth, mirthfulness, racketing, reveling,
   revelment, revelry, revels, skylarking, whoopee