| deficiency(noun, lack, defect, imperfection, limitation) |
| frailty(noun, weakness, failure, hopelessness, inability) |
| impotency |
| ineffectuality(noun, weakness, hopelessness, inability, helplessness) |
| ineffectualness(noun, weakness, failure, lack, failing) |
| inefficacy(noun, weakness, failure, lack, failing) |
| ineptness(noun, weakness, failure, hopelessness, inability) |
| lack(noun, weakness, failing, defect, deficiency) |
| necessity(noun, weakness, failure, hopelessness, inability) |
| amateurishness |
| blemish(defect, deficiency, imperfection, limitation, inadequacy) |
| dearth(lack, defect, deficiency, inadequacy, shortage) |
| defalcation(defect, deficiency, imperfection, inadequacy, shortage) |
| defect(noun, failure, lack, failing, deficiency) |
| defectiveness(defect, imperfection, inadequacy, shortage, inability) |
| deficit(defect, deficiency, imperfection, inadequacy, shortage) |
| drawback(noun, failure, lack, failing, defect) |
| failing(defect, deficiency, imperfection, limitation, inadequacy) |
| faultiness(defect, deficiency, imperfection, inadequacy, shortage) |
| imbecility |