- indispensable
- adj1. vital, essential, of the essence, important, of the utmost importance; imperative, urgent, exigent, instant, pressing, compelling, high-priority, high-pressure, life-and-death or life-or-death; necessary, needed, needful, called-for, in demand, requisite, required; fundamental, elementary, rudimentary, basic, bedrock, material, substantive, Inf. square-one.2. inescapable, unavoidable, includible, ineluctable, inevasible; certain, for certain, sure, for sure, sure as death, sure as death and taxes, inevasible, inevitable; mandatory, compulsory, obligatory, prescriptive, binding.n3. requirement, requisite, necessity, essential, must, must-item, Inf. must-have
A Note on the Style of the synonym finder. 2014.