The Collaborative International Dictionary of English v.0.48:

Hound \Hound\, n. [OE. hound, hund, dog, AS. hund; akin to OS. &
   OFries. hund, D. hond, G. hund, OHG. hunt, Icel. hundr, Dan.
   & Sw. hund, Goth. hunds, and prob. to Lith. sz?, Ir. & Gael.
   cu, L. canis, Gr. ?, ?, Skr. [,c]van. [root]229. Cf.
   Canine, Cynic, Kennel.]
   1. (Zool.) A variety of the domestic dog, usually having
      large, drooping ears, esp. one which hunts game by scent,
      as the foxhound, bloodhound, deerhound, but also used for
      various breeds of fleet hunting dogs, as the greyhound,
      boarhound, etc.
      [1913 Webster]

            Hounds and greyhounds, mongrels, spaniels, curs.
                                                  --Shak.
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   2. A despicable person. "Boy! false hound!" --Shak.
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   3. (Zool.) A houndfish.
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   4. pl. (Naut.) Projections at the masthead, serving as a
      support for the trestletrees and top to rest on.
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   5. A side bar used to strengthen portions of the running gear
      of a vehicle.
      [1913 Webster]

   To follow the hounds, to hunt with hounds.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Hound \Hound\, v. t. [imp. & p. p. Hounded; p. pr. & vb. n.
   Hounding.]
   1. To set on the chase; to incite to pursuit; as, to hounda
      dog at a hare; to hound on pursuers. --Abp. Bramhall.
      [1913 Webster]

   2. To hunt or chase with hounds, or as with hounds.
      --L'Estrange.
      [1913 Webster]

WordNet (r) 3.0 (2006):

hound
    n 1: any of several breeds of dog used for hunting typically
         having large drooping ears [syn: hound, hound dog]
    2: someone who is morally reprehensible; "you dirty dog" [syn:
       cad, bounder, blackguard, dog, hound, heel]
    v 1: pursue or chase relentlessly; "The hunters traced the deer
         into the woods"; "the detectives hounded the suspect until
         they found him" [syn: hound, hunt, trace]

Moby Thesaurus II by Grady Ward, 1.0:

257 Moby Thesaurus words for "hound":
   Afghan hound, Alaskan malamute, Bedlington terrier, Border terrier,
   Boston bull, Cairn terrier, Chihuahua, Dalmatian,
   Doberman pinscher, English toy spaniel, Eskimo dog, Gordon setter,
   Great Dane, Great Pyrenees, Kerry blue terrier, Labrador retriever,
   Maltese, Newfoundland, Norwegian elkhound, Norwich terrier,
   Pekingese, Rhodesian ridgeback, Rottweiler, Saluki, Samoyed,
   Scottish deerhound, Siberian husky, Welsh corgi, Welsh terrier,
   Yorkshire terrier, addict, affenpinscher, aficionado, aggravate,
   animal, annoy, badger, badger dog, bait, barbet, basset,
   basset hound, be at, beagle, beast, beat, bedevil, bedog, beset,
   bloodhound, boarhound, borzoi, bother, bowwow, boxer, bristle,
   browbeat, brown off, buff, bug, bull, bull terrier, bulldog, bully,
   bullyrag, burn up, canine, chase, cheer on, chivy, chow, coach dog,
   collector, collie, come after, come behind, coonhound, course, cur,
   dachshund, deerhound, demon, devil, devotee, discompose, distemper,
   disturb, dog, drive, drive on, eager beaver, egg on, energumen,
   enthusiast, exasperate, exercise, faddist, falcon, fan, fanatic,
   fash, fiend, flat-coated retriever, flush, follow,
   follow the hounds, follow up, fowl, fox terrier, foxhound, freak,
   fret, get, giant schnauzer, give chase, go after, go behind,
   go hunting, goad on, golden retriever, great one for, greyhound,
   griffon, gripe, gun, habitue, harass, harrier, harry, hasten on,
   haunt, hawk, heckle, hector, heel, hie on, hobbyist, hollo after,
   hound on, hunt, hunt down, hurry on, husky, hyena, infatuate,
   insect, irk, jack, jacklight, lakeland terrier, lover, make after,
   malamute, mastiff, miff, molest, mongrel, move behind, nag, needle,
   nettle, nudzh, nut, oppress, otterhound, papillon, peeve,
   persecute, pester, pick on, pig, pique, plague, pluck the beard,
   pointer, polecat, pooch, poodle, pother, prosecute, provoke,
   prowl after, pug, puli, pursue, pursuer, quest, quest after,
   raise the hunt, rat terrier, reptile, retriever, rhapsodist, ride,
   ride to hounds, rile, roil, root on, ruffle, run, run after,
   search, seek, seek out, serpent, setter, shadow, shikar, shoot,
   skunk, sleuth, sleuthhound, snake, spaniel, speed on, sport,
   spur on, staghound, stalk, start, still-hunt, string along,
   sucker for, swine, tag, tag after, tag along, tail, tailgate,
   take out after, tease, terrier, torment, track, trail, trail after,
   tread close upon, try the patience, turnspit, tweak the nose, tyke,
   urge on, varmint, vermin, vex, victimize, viper, visionary, votary,
   whelp, whip on, whippet, wire-haired terrier, wolfhound, worm,
   worry, zealot