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]

WordNet (r) 3.0 (2006):

splashing
    n 1: the act of splashing a (liquid) substance on a surface
         [syn: spatter, spattering, splash, splashing,
         splattering]
    2: the act of scattering water about haphazardly [syn: splash,
       splashing]

Moby Thesaurus II by Grady Ward, 1.0:

42 Moby Thesaurus words for "splashing":
   affusion, aspergation, aspersion, babbling, baptism, bath, bathing,
   bedewing, bubbling, burbling, dampening, damping, deluge, dewing,
   drowning, flooding, guggling, gurgling, hosing, hosing down,
   humidification, immersion, inundation, irrigation, lapping, laving,
   moistening, plashing, rinsing, rippling, sloshing, sparging,
   spattering, splattering, spraying, sprinkling, submersion,
   swashing, swishing, trilling, watering, wetting