| senility(noun, decline, weakness, age, infirmity) |
| aging |
| decrepitude(noun, decline, collapse, deterioration, age) |
| age(noun, decline, age, infirmity, feebleness) |
| agedness(noun, age, youth) |
| ageing |
| old age(noun, expression, idiom, decline, period) |
| dotage(noun, decline, age, infirmity, feebleness) |
| anility(noun, decline, age) |
| caducity(noun, age) |
| decay(noun, decline, collapse, down, deterioration) |
| decline(noun, collapse, deterioration, decay, impairment) |
| elderliness(noun, age, youth) |
| second childhood(noun, expression, idiom, decline, age) |
| senectitude(noun, decline, weakness, age, infirmity) |
| blight(noun, decline, collapse, deterioration, impairment) |
| oldness(noun, age) |
| weakness(noun, informal, age) |
| year(noun, age, youth) |
| adulteration(decline, collapse, deterioration, impairment, degeneration) |