The Collaborative International Dictionary of English v.0.48:

Splash \Splash\, v. t. [imp. & p. p. Splashed; p. pr. & vb. n.
   Splashing.] [Akin to plash.]
   1. To strike and dash about, as water, mud, etc.; to plash.
      [1913 Webster]

   2. To spatter water, mud, etc., upon; to wet.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Splash \Splash\, v. i.
   To strike and dash about water, mud, etc.; to dash in such a
   way as to spatter.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Splash \Splash\, n.
   1. Water, or water and dirt, thrown upon anything, or thrown
      from a puddle or the like; also, a spot or daub, as of
      matter which wets or disfigures.
      [1913 Webster]

   2. A noise made by striking upon or in a liquid.
      [1913 Webster]

WordNet (r) 3.0 (2006):

splash
    n 1: the sound like water splashing [syn: splash, plash]
    2: a prominent or sensational but short-lived news event; "he
       made a great splash and then disappeared" [syn: stir,
       splash]
    3: a small quantity of something moist or liquid; "a dab of
       paint"; "a splatter of mud"; "just a splash of whiskey" [syn:
       dab, splash, splatter]
    4: a patch of bright color; "her red hat gave her outfit a
       splash of color"
    5: the act of splashing a (liquid) substance on a surface [syn:
       spatter, spattering, splash, splashing,
       splattering]
    6: the act of scattering water about haphazardly [syn: splash,
       splashing]
    v 1: cause (a liquid) to spatter about, especially with force;
         "She splashed the water around her" [syn: sprinkle,
         splash, splosh]
    2: walk through mud or mire; "We had to splosh across the wet
       meadow" [syn: squelch, squish, splash, splosh,
       slosh, slop]
    3: dash a liquid upon or against; "The mother splashed the
       baby's face with water" [syn: spatter, splatter, plash,
       splash, splosh, swash]
    4: mark or overlay with patches of contrasting color or texture;
       cause to appear splashed or spattered; "The mountain was
       splashed with snow"
    5: make a splashing sound; "water was splashing on the floor"
       [syn: splash, splosh, slosh, slush]
    6: soil or stain with a splashed liquid
    7: strike and dash about in a liquid; "The boys splashed around
       in the pool"

Moby Thesaurus II by Grady Ward, 1.0:

202 Moby Thesaurus words for "splash":
   ado, asperge, babble, bedabble, bedew, bespatter, bespeckle,
   bespot, besprinkle, birthmark, blaze, blazon, blemish, bloodstain,
   blot, blotch, blur, brand, bravura, brilliancy, brouhaha, bubble,
   burble, caste mark, check, checkmark, cicatrix, commotion, cut,
   cut a dash, cut a figure, cut a swath, dab, dabble, damp, dampen,
   dapple, dappledness, dappleness, daring, dash, daub, dazzle,
   demonstration, dew, discoloration, display, dot, dottedness,
   douche, douse, dramatics, dramatize, drench, drown, earmark, eclat,
   engraving, etalage, excitement, exhibition, exhibitionism, eyesore,
   false front, fanfaronade, flaunt, flaunting, fleck, flick,
   flourish, flyspeck, foam, foofaraw, freckle, freckliness, froth,
   gash, glare, glitter, graving, guggle, gurgle, hack, histrionics,
   hose, hose down, humect, humectate, humidify, impression, irrigate,
   jot, lap, lapping, lentigo, macula, maculate, maculation, macule,
   make a figure, make a show, make a splash, manifestation, mark,
   marking, moisten, mole, mottle, mottledness, nevus, nick, notch,
   paddle, pageant, pageantry, parade, patch, plash, plaster, play up,
   point, pointillage, pointillism, polka dot, prick, puncture, purl,
   ripple, ripple of applause, ripple of laughter, scar,
   scarification, score, scotch, scratch, scratching, sensation, sham,
   shine, show, shower, showing-off, slobber, slop, slosh, smear,
   smirch, smouch, smudge, smut, smutch, soak, sop, sparge, spatter,
   speck, speckle, speckliness, spectacle, spindrift, splatter,
   splosh, splotch, splurge, sponge, spot, spottedness, spottiness,
   spray, spread, sprinkle, spume, spurtle, squirt, staginess, stain,
   stigma, stipple, stippledness, stippling, strawberry mark, swash,
   swish, syringe, taint, tarnish, tattoo, tattoo mark, theatrics,
   throw, tick, tittle, to-do, trill, uproar, vaunt, wash, washing,
   water, watermark, wet, wet down