growth

backslide, lapse, relapse

decadence, decay, decaying, declension, declination, decline, degeneracy, degeneration, degradation, descent, deterioration, devaluation, downfall, downgrade, ebbing, falling, weakening

decadence, decay, decaying, declension, decline, declining, degeneration, descent, deterioration

ebbing, fading, shriveling (or shrivelling), waning, wilting, withering

death, decease, demise, dying, end, exit, expiration, expiring, expiry, perishing

regression, retrogression, reversion