| unsubstantiality(noun, strong, weakness, condition, failing) |
| adynamia(noun, weak, sick, unhealthy) |
| ailment(noun, disorder, disease, weakness, fault) |
| anaemia(noun, weak, sick, unhealthy) |
| breakdown(noun, disorder, disease, illness, defect) |
| collapse(noun, disorder, disease, defect, sickness) |
| condition(noun, disorder, disease, illness, sickness) |
| decline(noun, frailty) |
| disability(noun, disorder, disease, weakness, illness) |
| disorder(noun, disease, weakness, fault, illness) |
| flabbiness(noun, weak, sick, unhealthy) |
| flimsiness(noun, strong, disorder, weakness, condition) |
| illness(noun, disorder, disease, weakness, condition) |
| indisposition(noun, disorder, disease, weakness, fault) |
| old age(noun, period) |
| senility(noun, weakness, fault, lack, lapse) |
| sluggishness |
| soft spot(noun, expression, weak, weakness, fault) |
| tenuity(noun, weak, beauty, sick, refinement) |
| washiness(noun, weak, sick, unhealthy) |