antecedence, antecedency, anteposition, anteriority, blandishment, buttonholing, cajolement, cajolery, case of need, clutch, coaxing, compulsion, constraint, crisis, crunch, demandingness, dire necessity, dominion, drive, dunning, emergency, exigence, exigency, extremity, front position, high pressure, immediacy, imperative, imperativeness, importance, importunacy, importunateness, importunity, impulse, impulsion, insistence, matter of necessity, nagging, necessity, need, persistence, pertinaciousness, pertinacity, pestering, pinch, plaguing, plying, precedence, precedency, preceding, precession, precursor, predicament, preference, prefixation, prelude, press, pressing, pressingness, pressure, priority, prothesis, push, rash impulse, seriousness, stress, superiority, teasing, tension, the lead, top priority, urge, urgent need, urging, wheedling