| advanced age(noun, expression, idiom, age) |
| ancient |
| ancientness |
| atrophy(decline, ruin, collapse, failing, deterioration) |
| breaking down(expression, decline, collapse, deterioration, impairment) |
| caries(decline, ruin, collapse, failing, deterioration) |
| climacteric |
| consumption(decline, ruin, collapse, failing, deterioration) |
| corrosion(decline, ruin, collapse, failing, deterioration) |
| crumbling(decline, ruin, collapse, failing, deterioration) |
| decadence(decline, ruin, collapse, failing, deterioration) |
| decomposition(noun, decline, collapse, deterioration, impairment) |
| decrease(noun, decline, ruin, collapse, failing) |
| decrepit |
| degeneracy(decline, ruin, collapse, failing, deterioration) |
| degeneration(noun, decline, ruin, collapse, failing) |
| depreciation(decline, ruin, collapse, failing, deterioration) |
| deterioration(noun, decline, collapse, impairment, degeneration) |
| development |
| dilapidation(decline, ruin, collapse, failing, deterioration) |