Brownian movement
about-face
advance
angular motion
ascending
ascent
axial motion
backflowing
backing
backset
backsliding
backward motion
backward step
career
climbing
comedown
course
current
debasement
decadence
decadency
declension
declination
decline
deformation
degeneracy
degenerateness
degeneration
degradation
demotion
depravation
depravedness
depreciation
derogation
descending
descent
deterioration
devolution
disenchantment
downtrend
downturn
downward mobility
downward motion
downward trend
drift
driftage
drop
dying
regressive metamorphism
retrograde development
reversal
retrogressive
backwardness
demoralisation
dilapidation
disengagement
disintegration
dormancy
enfeeblement
entangling
extinction
heart-disease
impoverishment
ossification
retrogradation
sclerosis
serfage
solidification
stagnation
stalemate
unfoldment
vitiation
weaken