THESAURUS
slippage
avalanche, coast, comedown, debasement, decadence, decadency, declension, declination, decline, deformation, degeneracy, degenerateness, degeneration, degradation, demotion, depravation, depravedness, depreciation, derogation, descent, deterioration, devolution, downtrend, downturn, downward mobility, downward trend, drop, dying, ebb, effeteness, fading, failing, failure, failure of nerve, fall, falling-off, glide, glissade, glissando, involution, landslide, landslip, lapse, loss of tone, regression, retrocession, retrogradation, retrogression, sideslip, skid, slide, slip, slither, slump, snowslide, snowslip, subsidence, wane