Decay

Decay, a photo by Neticola on Flickr.

adulteration, atrophy, blight, caries, consumption, corrosion, crumbling, decadence, decline, decomposition, decrease, decrepitude, degeneracy, degeneration, depreciation, deterioration, dilapidation, disintegration, disrepair, dissolution, downfall, dying, extinction, fading, failing, gangrene, impairment, mortification, perishing, putrefaction, putrescence, putridity, putridness, rot, rotting, ruin, ruination, rust, senescence, spoilage, spoilation, wasting, wasting away, withering