Absence, Adulteration, Ask, Mediocrity, Mind, Miss, Must, Necessaries, Necessities, Necessity, Need, Neediness, Nonexistence, Occasion, Omission, Ought, Outage, Passion, Patchiness, Penury, Pinch, Pleasure, Poorness, Prefer, Privation, Require, Requirement, Requisite, Requisition, Scantiness, Serve, Shortage, Shortcoming, Shortfall, Should, Slump, Starvation, Starve, Subtraction, Unevenness, Unsoundness, Urge, Will, Wish, Become, Befit, Beggary, Blank, Break, Choose, Claim, Collapse, Covet, Crave, Curiosity, Dearth, Decline, Default, Defect, Defectiveness, Deficiency, Deficit, Demand, Deprivation, Desideratum, Desire, Destitution, Discontinuity, Drive, Drought, Eagerness, Essential, Essentials, Exact, Exigency, Fail, Fallibility, Famine, Fancy, Follow, Gap, Gripe, Hiatus, Homelessness, Hope, Immaturity, Impairment, Imperfection, Impoverishment, Impurity, Inaccuracy, Inadequacy, Incompleteness, Indispensable, Inexactitude, Insufficiency, Interval, Lack, Lacuna, Lag, Libido, Like, Love, Lust