cascade, cataract, chute, collapse, comedown, crash, debacle, debasement, decadence, decadency, declension, declination, decline, defluxion, deformation, degeneracy, degenerateness, degeneration, degradation, demotion, depravation, depravedness, depreciation, derogation, descending, descension, descent, deterioration, devolution, down, downbend, downcome, downcurve, downfall, downflow, downgrade, downpour, downrush, downtrend, downturn, downward mobility, drop, dropping, dying, ebb, effeteness, fading, failing, failure, failure of nerve, fall, falling-off, falling, gravitation, inclination, involution, lapse, loss of tone, plummeting, pounce, rapids, regression, retrocession, retrogradation, retrogression, slippage, slump, stoop, swoop, wane, waterfall