The Collaborative International Dictionary of English v.0.48:

Splatter \Splat"ter\, v. i. & t.
   To spatter; to splash.
   [1913 Webster]

WordNet (r) 3.0 (2006):

splatter
    n 1: the noise of something spattering or sputtering
         explosively; "he heard a spatter of gunfire" [syn:
         spatter, spattering, splatter, splattering,
         sputter, splutter, sputtering]
    2: 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]
    v 1: cause or allow (a liquid substance) to run or flow from a
         container; "spill the milk"; "splatter water" [syn:
         spill, slop, splatter]
    2: dash a liquid upon or against; "The mother splashed the
       baby's face with water" [syn: spatter, splatter, plash,
       splash, splosh, swash]

Moby Thesaurus II by Grady Ward, 1.0:

123 Moby Thesaurus words for "splatter":
   Scotch mist, asperge, beat, beat a ruffle, beat a tattoo, bedabble,
   bedew, bespatter, bespeckle, bespot, besprinkle, blood rain,
   bloodstain, blot, blotch, blur, brand, bread, crumb, dab, dabble,
   damp, dampen, dash, daub, dew, dot, douche, douse, dredge, drizzle,
   drum, dust, evening mist, eyesore, fall, fleck, flick, flour,
   flurry, flutter, flyspeck, foam, freckle, froth, go pitapat,
   gout of rain, hose, hose down, humect, humectate, humidify,
   irrigate, macula, maculate, maculation, macule, mark, mist,
   misty rain, mizzle, moisten, moisture, paddle, palpitate, patch,
   patter, pepper, pitter-patter, plash, pound, powder, precipitation,
   pulsate, rain, raindrop, rainfall, rainwater, roll, ruffle,
   sheet of rain, shower, slobber, slop, slosh, smear, smirch, smouch,
   smudge, smut, smutch, sound a tattoo, sparge, spatter, speck,
   speckle, spindrift, splash, splosh, splotch, splurge, splutter,
   sponge, spot, spray, sprinkle, spume, spurtle, sputter, stain,
   stigma, stud, swash, syringe, taint, tarnish, throb, thrum, thump,
   unfrozen hydrometeor, water, wet, wet down