THESAURUS
indispensable
bare necessities, basic, bedrock, call for, called for, cardinal, central, compelling, compulsory, crucial, demand, demand for, demanded, desideration, desideratum, essential, essentials, focal, fundamental, imperative, important, in demand, indicated, ineluctable, inescapable, irreducible, irreductible, irreplaceable, key, life-and-death, life-or-death, mandatory, material, must, must item, necessaries, necessary, necessities, necessitous, necessity, need, need for, needed, needful, obligatory, occasion, of the essence, of vital importance, prerequirement, prerequisite, required, requirement, requisite, requisition, sine qua non, substantive, the necessary, the needful, unavoidable, unforgoable, urgent, vital, want, wanted
ROGET THESAURUS
indispensable
Requirement
N
requirement, need, wants, necessities, necessaries, necessaries of life, stress, exigency, pinch, sine qua non, matter of necessity, case of need, case of life or death, needfulness, essentiality, necessity, indispensability, urgency, requisition, run upon, demand, call for, charge, claim, command, injunction, mandate, order, precept, desideratum, want, Adj, required, requisite, needful, necessary, imperative, essential,
indispensable, prerequisite, called for, in demand, in request, urgent, exigent, pressing, instant, crying, absorbing, in want of, destitute of, ex necessitate rei, of necessity, there is no time to lose, it cannot be spared, it cannot be dispensed with, mendacem memorem esse oportet, necessitas non habet legem, nec tecum possum trivere nec sine te.