squealer

from WordNet (r) 3.0 (2006)

squealer
    n 1: one who reveals confidential information in return for
         money [syn: {informer}, {betrayer}, {rat}, {squealer},
         {blabber}]
    2: domestic swine [syn: {hog}, {pig}, {grunter}, {squealer},
       {Sus scrofa}]

from The Collaborative International Dictionary of English v.0.48

Squealer \Squeal"er\ (-[~e]r), n.
   1. One who, or that which, squeals.
      [1913 Webster]

   2. (Zool.)
      (a) The European swift.
      (b) The harlequin duck.
      (c) The American golden plover.
          [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

23 Moby Thesaurus words for "squealer":
      betrayer, blab, blabber, blabberer, blabbermouth, canary, delator,
      fink, informer, narc, nark, peacher, snitch, snitcher, spy,
      stool pigeon, stoolie, talebearer, tattler, tattletale, telltale,
      tipster, whistle-blower

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