bloodsucker

from WordNet (r) 3.0 (2006)
bloodsucker
    n 1: carnivorous or bloodsucking aquatic or terrestrial worms
         typically having a sucker at each end [syn: {leech},
         {bloodsucker}, {hirudinean}]
from The Collaborative International Dictionary of English v.0.48
Bloodsucker \Blood"suck`er\, n.
   1. (Zool.) Any animal that sucks blood; esp., the leech
      ({Hirudo medicinalis}), and related species.
      [1913 Webster]

   2. One who sheds blood; a cruel, bloodthirsty man; one guilty
      of bloodshed; a murderer. [Obs.] --Shak.
      [1913 Webster]

   3. A hard and exacting master, landlord, or money lender; an
      extortioner.
      [1913 Webster]
from Moby Thesaurus II by Grady Ward, 1.0
29 Moby Thesaurus words for "bloodsucker":
      barnacle, bedbug, blackmailer, extortioner, extortionist,
      freeloader, hanger-on, harpy, leech, lounge lizard, moocher,
      mosquito, parasite, predator, profiteer, racketeer, raptor,
      scrounge, scrounger, shakedown artist, shark, spiv, sponge,
      sponger, sucker, tick, vampire, vulture, wood tick
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