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 falling-off gravitation inclination involution lapse loss of tone plummeting pounce rapids regression retrocession retrogradation retrogression slippage slump stoop swoop wane waterfall