| decrepitude(decline, ruin, collapse, failing, deterioration) |
| degeneracy(decline, ruin, collapse, failing, deterioration) |
| degeneration(decline, ruin, collapse, failing, deterioration) |
| dent(noun, space, hole, hollow, pocket) |
| depreciation(decline, ruin, collapse, failing, deterioration) |
| depression(noun, space, hole, hollow, pocket) |
| deterioration(decline, collapse, impairment, degeneration, putridity) |
| dilapidation(decline, ruin, collapse, failing, deterioration) |
| disintegration(decline, collapse, deterioration, impairment, degeneration) |
| disrepair(decline, ruin, collapse, failing, deterioration) |
| dissolution(decline, ruin, collapse, failing, deterioration) |
| downfall(decline, ruin, collapse, failing, deterioration) |
| dry gangrene |
| dry rot |
| dying(decline, ruin, collapse, failing, deterioration) |
| eruption(noun, disease) |
| extinction(decline, ruin, collapse, failing, deterioration) |
| fading(decline, ruin, collapse, failing, deterioration) |
| failing(decline, ruin, collapse, deterioration, impairment) |
| foulness |