Synonyms and related words :
coasting, coming apart, cracking, crumbling, decadent, declining, degenerate, deteriorating, disintegrating, draining, drooping, dwindling, ebbing, effete, fading, failing, falling, flagging, flow, flowing, fragmenting, glide, gliding, going to pieces, languishing, marcescent, pining, regressive, retrograde, retrogressive, sailing, shriveling, sinking, skating, skiing, skim, sledding, slide, slipping, slither, slithering, slumping, subsiding, sweep, sweeping, tabetic, tobogganing, waning, wasting, wilting, withering, worsening