| inadequateness(noun, defect, deficiency, inadequacy, shortage) |
| inaptness(noun, defect, deficiency, inadequacy, shortage) |
| incapacity(noun, defect, deficiency, inadequacy, shortage) |
| incompetence(noun, defect, deficiency, inadequacy, shortage) |
| incompetency(noun, defect, deficiency, inadequacy, shortage) |
| incompleteness(noun, defect, deficiency, inadequacy, shortage) |
| ineffectiveness(noun, defect, deficiency, inadequacy, shortage) |
| ineffectualness(noun, defect, deficiency, inadequacy, shortage) |
| inefficacy(noun, defect, deficiency, inadequacy, shortage) |
| inefficiency(noun, defect, deficiency, inadequacy, shortage) |
| ineptitude(noun, defect, deficiency, inadequacy, shortage) |
| inferiority |
| insubstantial |
| insufficience(noun, weakness, lack, loss, failing) |
| lacuna |
| lapse(noun, weakness, failure, lack, deficiency) |
| larceny |
| laxness |
| leanness(noun, weakness, failure, lack, lapse) |
| loss(noun, ruin, weakness, failure, lack) |