The DICT Development Group

  Diver \Div"er\, n.
     1. One who, or that which, dives.
        [1913 Webster]
  
              Divers and fishers for pearls.        --Woodward.
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     2. Fig.: One who goes deeply into a subject, study, or
        business. "A diver into causes." --Sir H. Wotton.
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     3. (Zool.) Any bird of certain genera, as Urinator
        (formerly Colymbus), or the allied genus Colymbus, or
        Podiceps, remarkable for their agility in diving.
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     Note: The northern diver ({Urinator imber) is the loon; the
           black diver or velvet scoter ({Oidemia fusca) is a sea
           duck. See Loon, and Scoter.
           [1913 Webster]

  diver
      n 1: someone who works underwater [syn: diver, frogman,
           underwater diver]
      2: someone who dives (into water) [syn: diver, plunger]
      3: large somewhat primitive fish-eating diving bird of the
         northern hemisphere having webbed feet placed far back;
         related to the grebes [syn: loon, diver]

  22 Moby Thesaurus words for "diver":
     bather, bathing beauty, bathing girl, cannon, cutpurse,
     deep-sea diver, dip, free diver, frogman, jumper, mermaid, merman,
     natator, parachute jumper, pearl diver, plunger, scuba diver,
     skin diver, sky diver, snorkel diver, swimmer, wire