The Collaborative International Dictionary of English v.0.48:

Exuberance \Ex*u"ber*ance\, n. [L. exuberantia: cf. F.
   exub['e]rance.]
   The state of being exuberant; an overflowing quantity; a
   copious or excessive production or supply; superabundance;
   richness; as, an exuberance of joy, of fancy, or of foliage.

   Syn: Abundance; superabundance; excess; plenty; copiousness;
        profusion; richness; overflow; overgrowth; rankness;
        wantonness. See Abundance.
        [1913 Webster]

WordNet (r) 3.0 (2006):

exuberance
    n 1: joyful enthusiasm
    2: overflowing with eager enjoyment or approval [syn:
       exuberance, enthusiasm, ebullience]

Moby Thesaurus II by Grady Ward, 1.0:

176 Moby Thesaurus words for "exuberance":
   abandon, abundance, affluence, ample sufficiency, ampleness,
   amplitude, animal spirits, animation, ardor, avalanche,
   beatification, beatitude, bewitchment, blessedness, bliss,
   blissfulness, bonanza, bountifulness, bountiousness, bumper crop,
   buoyancy, capersomeness, cheer, cheerfulness, cloud nine,
   cloud of words, coltishness, copiousness, delectation, delight,
   diffuseness, diffusion, diffusiveness, ecstasy, ecstatics,
   effervescence, effusion, effusiveness, elan, elation, enchantment,
   esprit, exaltation, exhilaration, extravagance, fecundity,
   felicity, fertility, flood, flow, fluency, foison, formlessness,
   friskiness, frolicsomeness, fructiferousness, fruitfulness,
   full measure, fullness, gaiety, gamesomeness, gayness, generosity,
   generousness, gladness, glee, great abundance, great plenty, gush,
   gushing, gusto, happiness, heartiness, heaven, high spirits,
   intoxication, joy, joyance, joyfulness, landslide, lavishness,
   liberality, liberalness, life, liveliness, logorrhea, lots,
   lushness, luxuriance, macrology, maximum, more than enough, much,
   myriad, myriads, numerousness, opulence, opulency, outpour,
   outpouring, overflow, overhappiness, overjoyfulness, palilogy,
   paradise, piss and vinegar, playfulness, plenitude, plenteousness,
   plentifulness, plenty, pleonasm, pregnancy, prevalence,
   procreativeness, prodigality, productive capacity, productiveness,
   productivity, profuseness, profusion, prolificacy, prolificity,
   quantities, rampancy, rankness, rapture, ravishment, redundancy,
   reiteration, reiterativeness, repetition for effect,
   repetitiveness, repleteness, repletion, rich harvest, rich vein,
   richness, riot, riotousness, rollicksomeness, rompishness, scads,
   seventh heaven, shower, skittishness, spate, spirit, spiritedness,
   spirits, sportiveness, sprightliness, stream, substantiality,
   substantialness, sunshine, superabundance, superfluity, superflux,
   swarmingness, talkativeness, tautology, teeming womb, teemingness,
   tirade, transport, unalloyed happiness, verve, vigor, vim,
   vitality, vivacity, wealth, zest, zestfulness, zip