Synonyms and related words :
back, backslide, cock, decline, die away, diminish, drift away, dwindle, ebb, fade, fade away, fall astern, fall back, fall behind, get behind, go, go away, go backwards, go behind, jerk back, lapse, lapse back, lose ground, move away, move off, pull away, pull back, recede, recidivate, regress, relapse, retire, retract, retreat, retroflex, retrograde, retrogress, retrovert, return, reverse, revert, shrink, sink, slip back, stand off, wane, widen the distance, withdraw