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]

WordNet (r) 3.0 (2006):

spattering
    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]

Moby Thesaurus II by Grady Ward, 1.0:

79 Moby Thesaurus words for "spattering":
   affusion, aspergation, aspersion, attenuation, baptism, bath,
   bathing, beating, bedewing, broadcast, broadcasting, circumfusion,
   clicking, dampening, damping, deluge, dewing, diffraction,
   diffusion, dilution, dispensation, dispersal, dispersion,
   dissemination, dissipation, distribution, divergence, drowning,
   drumming, evaporation, expansion, few, flooding, fluttering,
   fragmentation, handful, hosing, hosing down, humidification,
   immersion, inundation, irrigation, laving, moistening, palpitant,
   peppering, pounding, propagation, publication, radiation, rinsing,
   scattering, scatterment, shotgun pattern, smatter, smattering,
   sowing, sparging, spatter, splashing, splattering, splay,
   spluttering, spraying, spread, spreading, sprinkling, sputtering,
   staccato, strewing, submersion, swashing, throbbing, thrumming,
   thumping, ticking, volatilization, watering, wetting