The Collaborative International Dictionary of English v.0.48:
Ebullience \E*bul"lience\ (?; 106), Ebulliency \E*bul"lien*cy\, n. A boiling up or over; effervescence. --Cudworth. [1913 Webster]WordNet (r) 3.0 (2006):
ebullience n 1: overflowing with eager enjoyment or approval [syn: exuberance, enthusiasm, ebullience]