noun
breaking down, collapse
Synonyms: 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
Antonyms: development, flourish, germination, growth, improvement, ripening, strength, strengthening
verb
deteriorate, crumble
Synonyms: atrophy, become contaminated, be impaired, blight, break up, collapse, corrode, curdle, decline, decompose, defile, degenerate, depreciate, discolor, disintegrate, dissolve, dry-rot, dwindle, fade, fail, get worse, go bad, go to seed, go to the dogs, hit rock bottom, hit the skids, lessen, mildew, mold, molder, mortify, pejorate, perish, pollute, putrefy, putresce, reach depths, rot, sap, shrivel, sicken, sink, slump, spoil, suppurate, turn, wane, waste away, weaken, wear away, wither
Antonyms: build, develop, flourish, germinate, grow, improve, ripen, strengthen