WordNet (r) 3.0 (2006):

divulgence
    n 1: the act of disclosing something that was secret or private
         [syn: divulgence, divulgement]

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "divulgence":
   babbling, betrayal, blabbering, blabbing, communication leak,
   dead giveaway, divulgation, divulgement, divulging, evulgation,
   giveaway, indiscretion, leak, letting out, obvious clue, telltale,
   telltale sign, unwitting disclosure