The Collaborative International Dictionary of English v.0.48:

awash \a*wash"\, a. [Pref. a- + wash.]
   1. Washed by the waves or tide; -- said of a rock or strip of
      shore; or specifically: (Naut.) flush with the surface of
      the water, so that the waves break over it; -- of an
      anchor, etc.
      [1913 Webster]

   2. Abounding; filled; covered; -- used mostly with in or
      with, in phrases such as "stores awash with customers".
      [PJC]

WordNet (r) 3.0 (2006):

awash
    adj 1: covered with water; "the main deck was afloat (or
           awash)"; "the monsoon left the whole place awash"; "a
           flooded bathroom"; "inundated farmlands"; "an overflowing
           tub" [syn: afloat(p), awash(p), flooded,
           inundated, overflowing]

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "awash":
   afloat, at flood, bathed, deluged, dipped, drenched, dribbling,
   dripping, dripping wet, drowned, engulfed, floating, flooded,
   immersed, in spate, inflood, inundated, macerated, oozing,
   overflowed, overwhelmed, permeated, saturated, seeping, soaked,
   soaking, soaking wet, soaky, sodden, soggy, sopping, sopping wet,
   soppy, soused, steeped, submerged, submersed, swamped, swept,
   washed, water-borne, water-washed, waterlogged, watersoaked,
   weeping, weltering, whelmed, wringing wet