Synonyms of decay in English:

decay


See definition of decay

verb

1‘the flesh of the corpses had decayed’

SYNONYMS

decompose, rot, putrefy, go bad, go off, spoil, fester, perish, deteriorate

degrade, break down, break up, moulder, shrivel, shrivel up, wither

technical mortify, necrotize, sphacelate

archaic corrupt

2‘the inner cities in Britain continue to decay’

SYNONYMS

deteriorate, degenerate, decline, go downhill, slump, slip, slide, go to rack and ruin, go to seed, run to seed, worsen, crumble, disintegrate, fall to pieces, come apart at the seams, fall into disrepair, become dilapidated

fail, wane, ebb, dwindle, collapse

informal go to pot, go to the dogs, hit the skids, go down the tubes, go down the toilet

NZ Australian informal go to the pack

ANTONYMS

improve


noun

1‘the fish showed no signs of decay’

SYNONYMS

decomposition, rotting, going bad, putrefaction, putrescence, putridity, festering, spoilage, perishing, withering, shrivelling

rot, mould, mildew, fungus

archaic corruption

2‘consumption of sugar can lead to tooth decay’

SYNONYMS

rot, rotting, corrosion, corroding, decomposition

caries, cavities, holes

rare cariosity

3‘they blame TV for the decay of American values’

SYNONYMS

deterioration, degeneration, debasement, degradation, decline, slipping, waning, ebb, shrinking, withering, weakening, atrophy, crumbling, disintegration, collapse, lapse, fall, failure

formal devolution

dated decadence

ANTONYMS

improvement