Synonyms and related words :
abri, air-raid shelter, antre, bend, bomb shelter, bombproof, bow, bowl, break, break down, breakdown, breaking up, breakup, buckle, bunker, burrow, capitulate, cataclysm, catastrophe, cave in, cave-in, cavern, cavity, collapse, concave, concealment, couch, cove, cover, covert, coverture, crack-up, crash, crumple, cup, cyclone cellar, debacle, decline, defer, deflate, den, disaster, dish, droop, dugout, earth, fall in, fallout shelter, flop, flop down, flump, flump down, fold, fold up, form, founder, foxhole, funk hole, give way, go, go down, grot, grotto, hole, hollow, hollow out, implode, knuckle, knuckle under, lair, lapse, lodge, lower, mew, plop, plop down, plump, puncture, run, safety zone, sag, set, settle, settle down, sewer, shelter, shipwreck, sink, sink down, slouch, slump, slump down, smash, smashup, storm cave, storm cellar, submerge, submit, subside, subterrane, subterranean, subway, succumb, surrender, swag, total loss, trench, tunnel, warren, washout, wrack, wreck, yield