The Collaborative International Dictionary of English v.0.48:

Sawhorse \Saw"horse`\, n.
   A kind of rack, shaped like a double St. Andrew's cross, on
   which sticks of wood are laid for sawing by hand; -- called
   also buck, and sawbuck.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Buck \Buck\ (b[u^]k), n. [Akin to LG. b["u]ke, Dan. byg, Sw.
   byk, G. bauche: cf. It. bucato, Prov. Sp. bugada, F.
   bu['e]e.]
   1. Lye or suds in which cloth is soaked in the operation of
      bleaching, or in which clothes are washed.
      [1913 Webster]

   2. The cloth or clothes soaked or washed. [Obs.] --Shak.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Buck \Buck\, v. t. [imp. & p. p. Bucked (b[u^]kt); p. pr. &
   vb. n. Bucking.] [OE. bouken; akin to LG. b["u]ken, Dan.
   byge, Sw. byka, G. bauchen, beuchen; cf. OF. buer. Cf. the
   preceding noun.]
   1. To soak, steep, or boil, in lye or suds; -- a process in
      bleaching.
      [1913 Webster]

   2. To wash (clothes) in lye or suds, or, in later usage, by
      beating them on stones in running water.
      [1913 Webster]

   3. (Mining) To break up or pulverize, as ores.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Buck \Buck\ (b[u^]k), v. i.
   1. To copulate, as bucks and does.
      [1913 Webster]

   2. To spring with quick plunging leaps, descending with the
      fore legs rigid and the head held as low down as possible;
      -- said of a vicious horse or mule.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Buck \Buck\, v. t.
   1. (Mil.) To subject to a mode of punishment which consists
      in tying the wrists together, passing the arms over the
      bent knees, and putting a stick across the arms and in the
      angle formed by the knees.
      [1913 Webster]

   2. To throw by bucking. See Buck, v. i., 2.
      [1913 Webster]

            The brute that he was riding had nearly bucked him
            out of the saddle.                    --W. E.
                                                  Norris.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Buck \Buck\ (b[u^]k), n. [OE. buk, bucke, AS. bucca, bua,
   he-goat; akin to D. bok, OHG. pocch, G. bock, Ir. boc, W.
   bwch, Corn. byk; cf. Zend b[=u]za, Skr. bukka. [root]256. Cf.
   Butcher, n.]
   1. The male of deer, especially fallow deer and antelopes, or
      of goats, sheep, hares, and rabbits.
      [1913 Webster]

   Note: A male fallow deer is called a fawn in his first year;
         a pricket in his second; a sorel in his third; a sore
         in his fourth; a buck of the first head in his fifth;
         and a great buck in his sixth. The female of the fallow
         deer is termed a doe. The male of the red deer is
         termed a stag or hart and not a buck, and the female is
         called a hind. --Brande & C.
         [1913 Webster]

   2. A gay, dashing young fellow; a fop; a dandy.
      [1913 Webster]

            The leading bucks of the day.         --Thackeray.
      [1913 Webster]

   3. A male Indian or negro. [Colloq. U.S.]
      [1913 Webster]

   Note: The word buck is much used in composition for the names
         of antelopes; as, bush buck, spring buck.
         [1913 Webster]

   Blue buck. See under Blue.

   Water buck, a South African variety of antelope (Kobus
      ellipsiprymnus). See Illust. of Antelope.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Buck \Buck\, n.
   A frame on which firewood is sawed; a sawhorse; a sawbuck.
   [1913 Webster]

   Buck saw, a saw set in a frame and used for sawing wood on
      a sawhorse.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Buck \Buck\, n. [See Beech, n.]
   The beech tree. [Scot.]
   [1913 Webster]

   Buck mast, the mast or fruit of the beech tree. --Johnson.
      [1913 Webster]

WordNet (r) 3.0 (2006):

buck
    n 1: a gymnastic horse without pommels and with one end
         elongated; used lengthwise for vaulting [syn: vaulting
         horse, long horse, buck]
    2: a piece of paper money worth one dollar [syn: dollar,
       dollar bill, one dollar bill, buck, clam]
    3: United States author whose novels drew on her experiences as
       a missionary in China (1892-1973) [syn: Buck, Pearl Buck,
       Pearl Sydenstricker Buck]
    4: a framework for holding wood that is being sawed [syn:
       sawhorse, horse, sawbuck, buck]
    5: mature male of various mammals (especially deer or antelope)
    v 1: to strive with determination; "John is bucking for a
         promotion"
    2: resist; "buck the trend" [syn: buck, go against]
    3: move quickly and violently; "The car tore down the street";
       "He came charging into my office" [syn: tear, shoot,
       shoot down, charge, buck]
    4: jump vertically, with legs stiff and back arched; "the yung
       filly bucked" [syn: buck, jerk, hitch]

Moby Thesaurus II by Grady Ward, 1.0:

327 Moby Thesaurus words for "buck":
   Beau Brummel, Belgian hare, Cape elk, Highland fling,
   Virginia deer, and jump, antagonize, antelope, assault, battle,
   bear, bear upon, beat against, beat up against, billy, billy goat,
   bloke, blood, blunt, boar, bone, boodle, boost, bounce, bound, boy,
   brass, bray, bread, breast the wave, broad jump, bub, bubba,
   bubbly-jock, buck off, buckjump, bucks, bud, buddy, buffet,
   buffet the waves, bull, bulldoze, bullock, bump, bump against,
   bunny, bunt, butt, butt against, cabbage, camel, camelopard,
   capriole, caribou, chanticleer, chap, chips, clear, close with,
   clotheshorse, cock, cockerel, colt, combat, comminute,
   compete with, contend against, contest, contriturate, convey,
   cottontail, coxcomb, cram, crowd, crush, cub, curvet, dandy, deer,
   deerlet, demivolt, depose, deracinate, dig, dinero, dislodge,
   dismount, dispute, doe, doeling, dog, dough, drake, drive,
   dromedary, dude, duel, eland, elbow, elk, entire, entire horse,
   exquisite, fallow deer, fawn, fellow, ferry, fight, fight against,
   fish, fledgling, flying jump, force, frogskin, galliard, gander,
   gazelle, gee, gelandesprung, gelt, gent, gentleman, gilt, giraffe,
   gnu, goad, goat, gobbler, grand jete, grapple with, grease, green,
   green stuff, guy, hand, handspring, hare, hart, hartebeest, he,
   he-goat, high jump, hind, hippety-hop, hobbledehoy, hop, horse,
   hump, hurdle, hurtle, hustle, jab, jack, jackrabbit, jam, jete,
   jig, jog, joggle, join battle with, jolt, jostle, jump, jump over,
   jump shot, jump turn, jump-hop, jump-off, kaama, kale, kid,
   labor against, lad, laddie, lapin, lavolta, leap, leap over,
   leapfrog, leporide, leveret, long jump, lounge lizard, macaroni,
   manchild, master, mazuma, militate against, moolah, moose, mopus,
   morris, mountain goat, muchacho, mule deer, musk deer, nanny,
   nanny goat, negotiate, nudge, offer resistance, oil of palms,
   ointment, okapi, oof, ooftish, oppose, overjump, overleap,
   overskip, pack, peacock, pile drive, poke, pole vault, pounce,
   pounce on, pounce upon, powder, press, prod, punch, pup, puppy,
   push, rabbit, ram, ram down, rattle, reach, red deer, reindeer,
   reluct, reluctate, repel, rhino, rival, rocks, roe, roe deer,
   roebuck, rooster, root out, root up, run, run against,
   running broad jump, running high jump, saut de basque, sawbuck,
   sawhorse, schoolboy, shake, she-goat, shekels, shoot, shoulder,
   shove, simoleons, ski jump, skin, skip, smacker, sonny, sonny boy,
   spondulics, spring, springbok, stag, stallion, start, start aside,
   start up, steeplechase, steer, stem the tide, stot, stress,
   strive against, struggle against, stud, studhorse, sugar, take on,
   tamp, the needful, throw off, thrust, tin, tom, tom turkey, tomcat,
   top cow, top horse, tote, tour jete, transport, traverse, trestle,
   trestle and table, trestle board, trestle table, trestlework,
   trestling, triturate, tup, turkey gobbler, turkey-cock, unhorse,
   unplace, unsaddle, unseat, updive, upleap, uproot, upspring, vault,
   vie with, wampum, wether, whelp, wildebeest, withstand, workhorse,
   young man, youth