THESAURUS
slide back
backslide, fall, fall again into, fall back, fall from grace, have a relapse, lapse, lapse back, recidivate, recur to, regress, relapse, return to, revert, revert to, sink back, slip back, yield again to
ROGET THESAURUS
slide back
Relapse
VB
relapse, lapse, fall back,
slide back, sink back, return, retrograde, recidivate, fall off again.