worsening
deformation
distortion
impairment
harm
damage
retrogressive
retrograde
misreform
take a turn for the worse
freefall
go backwards
go from bad to worse
misalter
worsen
suffer
crash
decrease
aggravate
lessening
drop-off
disimprove
deteriorating
pejorate
pejorism
exasperating
degeneration
aggravating
exacerbating
fall away
deterioratingly
agudization
wusser
downhill
have one foot on a banana peel
worse
worsened
kick someone when they are down
changeableness
run
tant pis
bettering
confound
below average
exasperate
exacerbate
drop behind
disimprovement
make heavy weather of
backward