The Collaborative International Dictionary of English v.0.48:

Spatter \Spat"ter\, v. t. [imp. & p. p. Spattered; p. pr. &
   vb. n. Spattering.] [From the root of spit salvia.]
   1. To sprinkle with a liquid or with any wet substance, as
      water, mud, or the like; to make wet of foul spots upon by
      sprinkling; as, to spatter a coat; to spatter the floor;
      to spatter boots with mud.
      [1913 Webster]

            Upon any occasion he is to be spattered over with
            the blood of his people.              --Burke.
      [1913 Webster]

   2. To distribute by sprinkling; to sprinkle around; as, to
      spatter blood. --Pope.
      [1913 Webster]

   3. Fig.: To injure by aspersion; to defame; to soil; also, to
      throw out in a defamatory manner.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Spatter \Spat"ter\, v. i.
   To throw something out of the mouth in a scattering manner;
   to sputter.
   [1913 Webster]

         That mind must needs be irrecoverably depraved, which,
         . . . tasting but once of one just deed, spatters at
         it, and abhors the relish ever after.    --Milton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

spatter
    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: the act of splashing a (liquid) substance on a surface [syn:
       spatter, spattering, splash, splashing,
       splattering]
    v 1: dash a liquid upon or against; "The mother splashed the
         baby's face with water" [syn: spatter, splatter,
         plash, splash, splosh, swash]
    2: rain gently; "It has only sprinkled, but the roads are slick"
       [syn: sprinkle, spit, spatter, patter, pitter-
       patter]
    3: spot, splash, or soil; "The baby spattered the bib with food"
       [syn: spatter, bespatter]

Moby Thesaurus II by Grady Ward, 1.0:

139 Moby Thesaurus words for "spatter":
   asperge, barrage, beat, beating, bedabble, bedaub, bedew,
   bespatter, bespeckle, bespot, besprinkle, bloodstain, blot, blotch,
   blur, brand, bread, crumb, dab, dabble, damp, dampen, dash, daub,
   dew, dot, douche, dredge, drizzle, drum, drum music, drumbeat,
   drumfire, drumming, dust, eyesore, fall, few, fleck, flick, flour,
   flutter, flyspeck, foam, freckle, froth, handful, hose, hose down,
   humect, humectate, humidify, irrigate, macula, maculate,
   maculation, macule, mark, mizzle, moisten, paddle, palpitation,
   paradiddle, patch, patter, pelt, pepper, pitapat, pitter-patter,
   plash, pound, pounding, pour, pour with rain, powder, precipitate,
   pulsation, rain, rain tadpoles, rat-a-tat, rat-tat, rat-tat-tat,
   rataplan, rattattoo, roll, rub-a-dub, ruff, ruffle, scattering,
   shower, shower down, slobber, slop, slosh, smatter, smattering,
   smear, smirch, smouch, smudge, smut, smutch, sparge, spattering,
   speck, speckle, spindrift, spit, splash, splatter, splotch,
   splutter, sponge, spot, spray, sprinkle, sprinkling, spume,
   sputter, staccato, stain, stigma, stream, stud, swash, syringe,
   taint, tarnish, tat-tat, tattoo, throb, throbbing, thrum, thumping,
   tom-tom, water, weep, wet, wet down