Same word as insufficience:
absence, bug, dearth, defalcation, default, defect, deficit, demerit, dereliction, failing, failure, fault, flaw, frailty, glitch, inability to hack it, insufficience, insufficiency, lack, loss, need, neglect, paucity, privation, scantiness, scarcity, shortage, shortcoming,
absence, bug, dearth, defalcation, default, defect, deficit, demerit, dereliction, failing, failure, fault, flaw, frailty, glitch, inability to hack it, insufficience, insufficiency, lack, loss, need, neglect, paucity, privation, scantiness, scarcity, shortage, shortcoming,