The Collaborative International Dictionary of English v.0.48:

Swash \Swash\, n. [Cf. Swash, v. i., Squash, v. t.] (Arch.)
   An oval figure, whose moldings are oblique to the axis of the
   work. --Moxon.
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   Swash plate (Mach.), a revolving circular plate, set
      obliquely on its shaft, and acting as a cam to give a
      reciprocating motion to a rod in a direction parallel to
      the shaft.
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The Collaborative International Dictionary of English v.0.48:

Swash \Swash\, a. [Cf. Swash, v. i., Squash, v. t.]
   Soft, like fruit too ripe; swashy. [Prov. Eng.] --Pegge.
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The Collaborative International Dictionary of English v.0.48:

Swash \Swash\, v. i. [imp. & p. p. Swashed; p. pr. & vb. n.
   Swashing.] [Probably of imitative origin; cf. Sw. svasska
   to splash, and, for sense 3, Sw. svassa to bully, to
   rodomontade.]
   1. To dash or flow noisily, as water; to splash; as, water
      swashing on a shallow place.
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   2. To fall violently or noisily. [Obs.] --Holinshed.
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   3. To bluster; to make a great noise; to vapor or brag.
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The Collaborative International Dictionary of English v.0.48:

Swash \Swash\, n.
   1. Impulse of water flowing with violence; a dashing or
      splashing of water.
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   2. A narrow sound or channel of water lying within a sand
      bank, or between a sand bank and the shore, or a bar over
      which the sea washes.
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   3. Liquid filth; wash; hog mash. [Obs.]
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   4. A blustering noise; a swaggering behavior. [Obs.]
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   5. A swaggering fellow; a swasher.
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WordNet (r) 3.0 (2006):

swash
    n 1: the movement or sound of water; "the swash of waves on the
         beach"
    v 1: make violent, noisy movements
    2: dash a liquid upon or against; "The mother splashed the
       baby's face with water" [syn: spatter, splatter, plash,
       splash, splosh, swash]
    3: show off [syn: boast, tout, swash, shoot a line,
       brag, gas, blow, bluster, vaunt, gasconade]
    4: act in an arrogant, overly self-assured, or conceited manner
       [syn: swagger, bluster, swash]

Moby Thesaurus II by Grady Ward, 1.0:

112 Moby Thesaurus words for "swash":
   aqueduct, arroyo, asperge, babble, bed, bedew, bespatter,
   besprinkle, bounce, brave show, bubble, burble, canal, creek bed,
   culvert, dabble, damp, dampen, dash, dew, donga, douche, douse,
   dry bed, flume, foam, froth, guggle, gulch, gully, gullyhole,
   gurgle, headrace, hose, hose down, humect, humectate, humidify,
   irrigate, irrigation ditch, lap, lapping, miles gloriosus, moisten,
   nullah, paddle, peacock, peacockery, peacockishness, plash, prance,
   purl, race, ripple, river bed, riverway, runnel, shower, slobber,
   slop, slosh, sluice, sparge, spatter, spillbox, spillway,
   spindrift, splash, splatter, splosh, splurge, sponge, spray,
   sprinkle, spume, spurtle, stalk, stream bed, streamway, strut,
   strutter, strutting, swagger, swaggerer, swaggering, swank,
   swanker, swash channel, swashbuckle, swashbuckler, swashbucklering,
   swashbucklery, swashbuckling, swasher, swish, syringe, tailrace,
   trill, wadi, wash, washing, water, water carrier, water channel,
   water furrow, water gap, water gate, watercourse, waterway,
   waterworks, wet, wet down