Washout(n.) The washing out or away of earth, etc., especially of a portion of the bed of a road or railroad by a fall of rain or a freshet; also, a place, especially in the bed of a road or railroad, where the earth has been washed away.
Thesaurus Entries
ablution, airmanship, alluvion, alluvium, also-ran, bankrupt, bollix, bomb, botch, breakdown, breaking up, breakup, brief, briefing, bungle, bust, cataclysm, catastrophe, cave, cave-in, cleaning out, collapse, crack-up, crash, debacle, deluge, disaster, douche, douching, dud, dull thud, elution, elutriation, enema, engulfment, failure, false alarm, fiasco, fizzle, flat failure, flight plan, flood, flop, floperoo, flunk, flush, flushing, flushing out, flying lessons, foozle, frost, hash, inundation, irrigation, lathering, lavabo, lavage, lavation, laving, lemon, loser, mess, mopping, mopping up, muddle, overflow, overflowing, overrunning, pilot training, pilotship, rinse, rinsing, rundown, scouring, scrub, scrubbing, scrubbing up, shampoo, shipwreck, smash, smashup, soaping, spill, spillage, sponge, sponging, submersion, swabbing, the Deluge, the Flood, total loss, turkey, wash, washing, washing up, washup, whelming, wiping up, wrack, wreck