complainer

from WordNet (r) 3.0 (2006)

complainer
    n 1: a person given to excessive complaints and crying and
         whining [syn: {whiner}, {complainer}, {moaner},
         {sniveller}, {crybaby}, {bellyacher}, {grumbler},
         {squawker}]

from The Collaborative International Dictionary of English v.0.48

Complainer \Com*plain"er\ (k[o^]m*pl[=a]n"[~e]r), n.
   One who complains or laments; one who finds fault; a
   murmurer. --Beattie.
   [1913 Webster]

         Speechless complainer, I will learn thy thought.
                                                  --Shak.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

27 Moby Thesaurus words for "complainer":
      bellyacher, complainant, crab, crank, croaker, faultfinder,
      frondeur, griever, griper, grouch, grouser, growler, grumbler,
      kicker, kvetch, lamenter, malcontent, mourner, murmurer, mutterer,
      querulous person, reactionary, reactionist, rebel, sorehead,
      sourpuss, whiner

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