[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

Tattle-Tale >> T Words
Tattle-Tale, definition of term: Tattle-Tale
tattle-tale_pag1.html