slippage (n.)

• avalanche
• coast
• comedown
• debasement
• decadence
• decadency
• declension
• declination
• decline
• deformation
• degeneracy
• degeneration
• degradation
• demotion
• depravation
• depreciation
• derogation
• descent
• deterioration
• devolution
• downturn
• drop
• dying
• ebb
• fading
• failing
• failure
• fall
• glide
• glissade
• glissando
• involution
• landslide
• landslip
• lapse
• regression
• retrogression
• sideslip
• skid
• slide
• slip
• slump
• subsidence
• wane