See tumble in Webster's New World Roget's A-Z Thesaurus II
verb
To come to the ground suddenly and involuntarily:
drop, fall, go down, nose-dive, pitch, plunge, spill, topple. Idiom: take a fall (or header) (or plunge) (or spill) (or tumble). See riseTo undergo a sharp, rapid descent in value or price:
dive, drop, fall, nose-dive, plummet, plunge, sink, skid, slump. Idiom: take a sudden downtrend (or downturn). See increaseTo bring about the downfall of:
bring down, overthrow, overturn, subvert, topple, unhorse. See helpTo put out of proper order:
derange, disarrange, disarray, disorder, disorganize, disrupt, disturb, jumble, mess up, mix up, muddle, unsettle, upset. See order
phrasal verb tumble onTo find or meet by chance:
bump into, chance on (or upon), come across, come on (or upon), find, happen on (or upon), light on (or upon), run across, run into, stumble on (or upon). (Archaic) alight on (or upon). Idiom: meet up with. See meet
noun
A sudden involuntary drop to the ground:
dive, fall, nosedive, pitch, plunge, spill. (Informal) header. See riseA usually swift downward trend, as in prices:
decline, descent, dip, dive, downslide, downswing, downtrend, downturn, drop, drop-off, fall, nosedive, plunge, skid, slide, slump. See increaseA lack of order or regular arrangement:
chaos, clutter, confusedness, confusion, derangement, disarrangement, disarray, disorder, disorderedness, disorderliness, disorganization, jumble, mess, mix-up, muddle, muss, scramble, topsy-turviness. (Slang) snafu. See orderA group of things gathered haphazardly:
agglomeration, bank1, cumulus, drift, heap, hill, mass, mess, mound, mountain, pile, shock2, stack. See order
Learn more about tumble