incapacity (n.)
- decrepitude
- disability
- disablement
- disqualification
- foolishness
- ignorance
- imbecility
- inability
- inadequacy
- inaptitude
- inaptness
- inattentiveness
- incapability
- incompetence
- incompetency
- ineffectiveness
- ineffectuality
- inefficacy
- inefficiency
- ineptitude
- ineptness
- infancy
- inferiority
- infirmity
- insipidity
- instability
- insufficiency
- invalidism
- irrationality
- maladjustment
- maladroitness
- mediocrity
- mindlessness
- minority
- ricketiness
- rustiness
- senility
- senselessness
- shakiness
- thoughtlessness
- unfitness
- unskillfulness
- unsoundness
- unsteadiness
- unwiseness
- vapidity
- wardship
- wateriness
