| ebb(noun, drop, fall, failure, deterioration) |
| ebbing(noun, drop, fall, failure, deterioration) |
| effeteness(noun, weakness, delicacy, inadequacy, shakiness) |
| enfeeblement(noun, drop, fall, weakness, deterioration) |
| etiolation(noun, weakness, delicacy, inadequacy, shakiness) |
| extinction(decline, ruin, collapse, failing, deterioration) |
| fading(decline, ruin, collapse, failing, deterioration) |
| falling off(noun, verb, expression, phrasal verb, drop) |
| fault(noun, disorder, weakness, illness, lack) |
| feverishness(noun, disease) |
| flu(noun, disorder, weakness, fault, illness) |
| foible(noun, weakness, fault, failing, flaw) |
| fondness(noun, weakness, fault, lack, lapse) |
| gangrene(decline, ruin, collapse, failing, deterioration) |
| gap(noun, weakness, fault, lack, lapse) |
| grand climacteric(expression, idiom, age) |
| gray hairs(expression, idiom, age) |
| handicap(noun, disease) |
| hoary age(expression, idiom, age) |
| hypochondria |