The Collaborative International Dictionary of English v.0.48:

jocularity \joc`u*lar"i*ty\ (j[o^]k`[-u]*l[a^]r"[i^]*t[y^]), n.
   Jesting; merriment.
   [1913 Webster]

WordNet (r) 3.0 (2006):

jocularity
    n 1: a feeling facetious merriment [syn: jocundity,
         jocularity]
    2: fun characterized by humor [syn: jocosity, jocularity]
    3: activity characterized by good humor [syn: jest, joke,
       jocularity]

Moby Thesaurus II by Grady Ward, 1.0:

39 Moby Thesaurus words for "jocularity":
   amusement, brilliance, cleverness, facetiousness, frivolity, fun,
   funniness, glee, gleefulness, high glee, hilariousness, hilarity,
   humorousness, jocoseness, jocundity, joking, jolliness, jollity,
   joshing, joviality, joy, joyfulness, joyousness, keen-wittedness,
   keenness, laughter, levity, merriment, merriness, mirth,
   mirthfulness, nimble-wittedness, pleasantry, pungency,
   quick-wittedness, saltiness, sharpness, smartness, wittiness