The Collaborative International Dictionary of English v.0.48:
jubilancy \jubilancy\ n. a feeling of extreme joy; jubilance; jubilation. Syn: exultation, jubilance, jubilation. [WordNet 1.5]WordNet (r) 3.0 (2006):
jubilancy n 1: a feeling of extreme joy [syn: exultation, jubilance, jubilancy, jubilation]