WordNet (r) 3.0 (2006):

leak out
    v 1: be leaked; "The news leaked out despite his secrecy" [syn:
         leak, leak out]

Moby Thesaurus II by Grady Ward, 1.0:

33 Moby Thesaurus words for "leak out":
   appear, be revealed, become known, break forth, break out,
   break through, come forth, come out, come to light, debouch,
   distill, dribble, drip, drop, emerge, erupt, exit, find vent,
   get out, issue, issue forth, leak, manifest itself, ooze out, out,
   run out, show its colors, show its face, stand revealed, transpire,
   trickle, trill, weep