Synonyms and related words :
abruptly, bang, blubber, boil, boil over, bubble, bubble over, bubble up, burble, cast, cave, cave in, chuck, clap, dash, decline, dive, droop, drop, effervesce, exactly, fall, ferment, fizz, fizzle, fling, flop, flop down, flump, flump down, flush, founder, full, give way, go down, guggle, gurgle, hastily, hiss, hurl, impetuously, impulsively, kerplunk, lapse, like a flash, like a thunderbolt, lower, nose-dive, of a sudden, on short notice, parachute, pitch, plank, plop down, plumb, plummet, plump, plunge, plunk, point-blank, pop, pounce, pounce on, pounce upon, precipitantly, precipitately, precipitously, precisely, right, sag, seethe, set, settle, settle down, sharp, simmer, sink, sink down, skin-dive, sky-dive, slap, slouch, slump, slump down, smack, smack-dab, sound, spang, sparkle, square, squarely, startlingly, stoop, straight, submerge, subside, sudden, suddenly, surprisingly, swag, swoop, swoop down, take a header, throw, thrust, toss, unawares, unexpectedly, without notice, without warning, work