Synonyms of indispensable in English:
education is indispensable for the preservation of democracy
essential, crucial, necessary, key, vital, needed, required, called for, requisite, important, all-important, vitally important, of the utmost importance, of great consequence, of the essence, critical, life-and-death, imperative, mandatory, compulsory, obligatory, compelling, urgent, pressing, burning, acute, paramount, pre-eminent, high-priority, significant, consequential
[Antonyms] dispensable, superfluous, non-essential
Choose the right word
indispensable, necessary, requisite, essential
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