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WORDNET DICTIONARY

Noun indispensability has 1 sense

• indispensability(n = noun.attribute) indispensableness, vitalness - the quality possessed by something that you cannot possibly do without; Array
is a kind of essentiality, essentialness
Antonym: dispensability
Derived forms adjective indispensable₁, adjective indispensable₂

CIDE DICTIONARY

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indispensability

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.

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