| inability(noun, weakness, skill, failure, lack) |
| incapability(noun, weakness, skill, failure, shortcoming) |
| incapacity(noun, weakness, skill, failure, shortcoming) |
| incompetence(noun, weakness, skill, failure, shortcoming) |
| disability |
| disqualification(noun, weakness, skill, failure, shortcoming) |
| inadequacy(noun, weakness, skill, failure, hopelessness) |
| inefficiency(noun, weakness, skill, failure, shortcoming) |
| ineptitude(noun, weakness, skill, failure, shortcoming) |
| breakdown(noun, weakness, prostration) |
| disablement |
| imbecility |
| incompetency(noun, weakness, failure, exclusion, hopelessness) |
| insufficiency(noun, weakness, skill, failure, shortcoming) |
| collapse(noun, weakness) |
| feebleness(noun, weakness, hopelessness, inability, helplessness) |
| impotence(noun, weakness, skill, failure, shortcoming) |
| inaptitude(noun, weakness, skill, failure, shortcoming) |
| ineffectuality(noun, weakness, hopelessness, inability, helplessness) |
| inefficacy(noun, weakness, skill, failure, shortcoming) |