Synonyms and related words :
Niagara, cascade, cataract, chute, collapse, comedown, crash, debacle, declension, declination, defluxion, descending, descension, descent, down, downbend, downcome, downcurve, downfall, downflow, downgrade, downpour, downrush, downtrend, downturn, downward trend, drop, dropping, eddy, fall, falling, falls, force, gravitation, inclination, linn, nappe, plummeting, pounce, rapids, riffle, sault, shoot, spout, stoop, surge, swoop, vortex, watershoot, whirlpool