The Collaborative International Dictionary of English v.0.48:

Plash \Plash\, n. [OD. plasch. See Plash, v.]
   1. A small pool of standing water; a puddle. --Bacon. "These
      shallow plashes." --Barrow.
      [1913 Webster]

   2. A dash of water; a splash.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Plash \Plash\, v. i. [imp. & p. p. Plashed; p. pr. & vb. n.
   Plashing.] [Cf. D. plassen, G. platschen. Cf. Splash.]
   To dabble in water; to splash. "Plashing among bedded
   pebbles." --Keats.
   [1913 Webster]

         Far below him plashed the waters.        --Longfellow.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Plash \Plash\, v. t.
   1. To splash, as water.
      [1913 Webster]

   2. To splash or sprinkle with coloring matter; as, to plash a
      wall in imitation of granite.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Plash \Plash\, v. t. [imp. & p. p. Plashed; p. pr. & vb. n.
   Plashing.] [OF. plaissier, plessier, to bend. Cf.
   Pleach.]
   To cut partly, or to bend and intertwine the branches of; as,
   to plash a hedge. --Evelyn.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Plash \Plash\, n.
   The branch of a tree partly cut or bent, and bound to, or
   intertwined with, other branches.
   [1913 Webster]

WordNet (r) 3.0 (2006):

plash
    n 1: the sound like water splashing [syn: splash, plash]
    v 1: interlace the shoots of; "pleach a hedge" [syn: pleach,
         plash]
    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:

96 Moby Thesaurus words for "plash":
   artificial lake, babble, bayou lake, brash, bubble, burble,
   burst of rain, cistern, cloudburst, dam, dead water, deluge, dike,
   douse, downfall, downflow, downpour, drencher, etang, farm pond,
   fishpond, flood, foam, freshwater lake, froth, glacial lake,
   guggle, gurgle, gushing rain, heavy rain, inland sea, lagoon,
   laguna, lake, lakelet, landlocked water, lap, lapping, linn, loch,
   lough, mere, millpond, millpool, nyanza, oxbow lake, pond, pondlet,
   pool, pour, puddle, purl, rainburst, rainspout, rainstorm,
   reservoir, ripple, salina, salt pond, scud, shower, slop, slosh,
   soaker, soaking rain, sparge, spate, spatter, spindrift, splash,
   splatter, splosh, splurge, spout, spray, sprinkle, spume, spurtle,
   stagnant water, standing water, still water, sump, swash, swish,
   tank, tarn, tidal pond, torrent of rain, trill, volcanic lake,
   wash, washing, water hole, water pocket, waterspout, well