| disintegration(noun, decline, collapse, deterioration, impairment) |
| disrepair(decline, ruin, collapse, failing, deterioration) |
| dissolution(decline, ruin, collapse, failing, deterioration) |
| downfall(decline, ruin, collapse, failing, deterioration) |
| dying(decline, ruin, collapse, failing, deterioration) |
| elder |
| extinction(decline, ruin, collapse, failing, deterioration) |
| fading(decline, ruin, collapse, failing, deterioration) |
| failing(decline, ruin, collapse, deterioration, impairment) |
| feebleness(noun, decline, age, infirmity) |
| gangrene(decline, ruin, collapse, failing, deterioration) |
| hoary |
| impairment(decline, collapse, deterioration, degeneration) |
| infirmity(noun, age) |
| maturation |
| mortification(decline, ruin, collapse, failing, deterioration) |
| perishing(decline, ruin, collapse, failing, deterioration) |
| putrefaction(noun, decline, collapse, deterioration, decay) |
| putrescence(noun, decline, collapse, deterioration, decay) |
| putridity(decline, collapse, deterioration, impairment, degeneration) |