debility (n.)
- adynamia
- anemia
- atony
- cachexia
- cachexy
- cowardice
- debilitation
- decrepitude
- delicacy
- disease
- dotage
- dullness
- eld
- enervation
- enfeeblement
- etiolation
- exhaustion
- eyestrain
- faintness
- fatigue
- feebleness
- flabbiness
- flaccidity
- fragility
- frailty
- hypochondria
- hypochondriasis
- impotence
- infirmity
- invalidism
- invalidity
- languor
- lassitude
- listlessness
- longevity
- malaise
- morbidity
- morbidness
- oldness
- overstrain
- prostration
- ricketiness
- senility
- sleepiness
- sluggishness
- softness
- strain
- superannuation
- tiredness
- unhealthiness
- unsoundness
- unwholesomeness
- valetudinarianism
- wasting
- weakness
- weariness
