Synonyms to be believed

go down, be lost, be received, be swallowed, bite the dust, bow, capsize, carry conviction, cascade, cataract, cave, cave in, collapse, come down, crash, crumple, decline, descend, die, dip, dip down, down, droop, drop, drop down, drop off, ebb, fade, fail, fall, fall away, fall down, fall off, find credence, flop, flop down, flump, flump down, fold, founder, give way, go downhill, go off, go under, gravitate, have enough, hit a slump, hit rock bottom, hit the skids, keel, keel over, lapse, lick the dust, lose, lose altitude, lose out, lose the day, lower, overset, overturn, parachute, pass current, pitch, pitchpole, plop, plop down, plummet, plump, plunge, pounce, pour down, precipitate, rain, reach the depths, run down, sag, say uncle, scuttle, set, settle, settle down, sink, sink down, sink like lead, slide, slip, slouch, slump, slump down, somersault, stoop, submerge, submerse, submit, subside, succumb, surrender, swag, swoop, take the count, topple, touch bottom, trend downward, tumble, turn over, turn turtle, upset, upset the boat, wane