the state of being deficient; lack; incompleteness; insufficiency.

the amount lacked; a deficit.

noun

adequacy , enough , faultlessness , perfection , plenty , satisfaction , sufficiency , superfluity

noun

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 , sin , want , weakness , inadequacy , poverty , scantness , scarceness , shortfall , underage , glitch , imperfection , meagreness , minus