whisperer

from WordNet (r) 3.0 (2006)

whisperer
    n 1: one who speaks in a whisper

from The Collaborative International Dictionary of English v.0.48

Whisperer \Whis"per*er\, n.
   [1913 Webster]
   1. One who whispers.
      [1913 Webster]

   2. A tattler; one who tells secrets; a conveyer of
      intelligence secretly; hence; a backbiter; one who
      slanders secretly. --Prov. xvi. 28.
      [1913 Webster]