(n.) Inadequacy; lack; insufficiency; failure; imperfection; shortcoming\; defect.

absence adulteration arrearage arrestment baseness beggary blemish break bug callowness catch crack dearth defalcation default defect defectibility defection defectiveness deficit demerit deprivation dereliction destitution discontinuity drawback drought erroneousness failing failure fallibility famine fault faultiness faute fewness flaw foible frailty gap hiatus hole immaturity impairment imperfection impoverishment impurity inaccuracy inadequacy inadequateness incompetence incompleteness incompletion inexactitude inexactness infirmity insufficiency interval kink lack lacuna little problem littleness maladroitness meanness mediocrity miscarriage missing link need neglect omission outage patchiness pettiness privation problem rift scantiness scrappiness shabbiness short measure short weight shortage shortcoming shortfall sin sketchiness smallness snag something missing starvation subnormality taint triviality ullage underage underdevelopment undevelopment unevenness unperfectedness unskillfulness unsoundness vulgarity vulnerable place want wantage weak link weak point weakness