[1] : WordNet (r) 2.0

tattletale
     n : someone who gossips indiscreetly syn: tattler, taleteller,
          talebearer, telltale, blabbermouth
see also:
tattler taleteller talebearer telltale blabbermouth 

[2] : Moby Thesaurus II by Grady Ward, 1.0

37 moby thesaurus words for "tattletale":
   a tale-bearing animal, betrayer, blab, blabber, blabberer,
   blabbermouth, busybody, delator, fink, gossip, gossip columnist,
   gossiper, gossipmonger, informer, narc, newsmonger, newspaperman,
   peacher, quidnunc, reporter, rumormonger, scandalmonger, snitch,
   snitcher, spy, squealer, stool pigeon, stoolie, tabby, talebearer,
   taleteller, tattler, telltale, tipster, tittle-tattler,
   whistle-blower, yenta

Tattletale >> T Words
Tattletale, definition of term: Tattletale
tattletale_pag1.html