libeler

from WordNet (r) 3.0 (2006)

libeler
    n 1: one who attacks the reputation of another by slander or
         libel [syn: {defamer}, {maligner}, {slanderer}, {vilifier},
         {libeler}, {backbiter}, {traducer}]

from The Collaborative International Dictionary of English v.0.48

Libeler \Li"bel*er\ (-[~e]r), n.
   One who libels. [Written also {libeller}.] " Libelers of
   others." --Buckminster.
   [1913 Webster]

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