| defile(verb, hurt, ruin, harm, spoil) |
| delapidate |
| depreciate(verb, drop, cut, decline, reduce) |
| die away(verb, expression, phrasal verb, drop, decline) |
| dry rot(noun, verb, expression, idiom, deterioration) |
| end(noun, verb, stop, decline, pass) |
| erosion(deterioration, disintegration, oxidation, corrosion, weathering) |
| excrement(noun, waste) |
| flag(verb, drop, decline, fall, fail) |
| loss(noun, drop, decline, ruin, defeat) |
| mould(noun, verb) |
| peter out(verb, expression, stop, drop, end) |
| radioactive decay(noun, expression, idiom) |
| rankle(verb, stop, end, pass, fall) |
| retrogress(verb, decline, reduce, fail, diminish) |
| retrogression(noun, drop, decline, return, deterioration) |
| sap(verb, blow, consume, exhaust, lose) |
| shrink(verb, drop, cut, decline, reduce) |
| wasting(noun, decline, collapse, down, deterioration) |
| wear away(verb, expression, phrasal verb, stop, drop) |