affluence, afflux, affluxion, cascade, cataract, chute, collapse, comedown, concourse, confluence, conflux, course, crash, crosscurrent, current, debacle, declension, declination, descending, descension, descent, discharge, down, downbend, downcome, downcurve, downfall, downflow, downgrade, downpour, downrush, downtrend, downturn, downward trend, drain, drainage, drift, driftage, drop, dropping, effluence, efflux, effluxion, effusion, exhalation, exhaust, fall, falling, flow, flowing, flowoff, fluency, flux, gravitation, gush, inclination, inflow, mill run, millrace, onrush, onward course, outfall, outflow, outflowing, outpour, outpouring, plummeting, pounce, race, rapids, run, runoff, rush, set, spate, stoop, stream, surge, swoop, tide, trend, undercurrent, undertow, water flow, waterfall