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indispensable - 20 thesaurus results
| Main Entry: | indispensable |
| Part of Speech: | adjective |
| Definition: | necessary |
| Synonyms: | basal, basic, cardinal, crucial, essential, fundamental, imperative, key, needed, prerequisite, primary, required, requisite, vital, necessitous, needful |
| Antonyms: | dispensable, needless, nonessential, redundant, superfluous, unnecessary |
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2009 by the Philip Lief Group.
Cite This Source
Copyright © 2009 by the Philip Lief Group.
Cite This Source
| Main Entry: | basic |
| Part of Speech: | adjective |
| Definition: | elementary, fundamental |
| Synonyms: | basal, capital, central, chief, elemental, essential, indispensable, inherent, intrinsic, key, main, necessary, primary, primitive, principal, radical, underlying, vital, substratal |
| Antonyms: | additional, extra, nonessential, outside, peripheral, secondary, inessential |
| Main Entry: | cardinal |
| Part of Speech: | adjective |
| Definition: | important, key |
| Synonyms: | basal, basic, central, chief, essential, first, foremost, fundamental, highest, indispensable, leading, main, overriding, paramount, pivotal, preeminent, primary, prime, principal, ruling, vital, constitutive, greatest, overruling |
| Antonyms: | insignificant, minor, negligible, secondary, unimportant, inessential |
| Main Entry: | fundamental |
| Part of Speech: | adjective |
| Definition: | basic, important |
| Synonyms: | axiomatic, basal, bottom, cardinal, central, constitutional, crucial, elemental, elementary, essential, first, indispensable, integral, intrinsic, key, major, necessary, organic, original, paramount, primary, prime, primitive, primordial, principal, radical, requisite, rudimentary, significant, structural, supporting, theoretical, underlying, vital, axiological, bottom-line, constitutive, foundational, grass-roots, meat-and-potatoes, substratal, substrative, sustaining, underived |
| Antonyms: | additional, advanced, auxiliary, extra, minor, secondary, subordinate, trivial, unimportant |
| Main Entry: | inherent |
| Part of Speech: | adjective |
| Definition: | basic, hereditary |
| Synonyms: | built-in, characteristic, congenital, constitutional, deep-rooted, deep-seated, distinctive, elementary, essential, fixed, fundamental, genetic, immanent, implicit, inborn, inbred, indigenous, indispensable, individual, ingrained, inherited, innate, inner, instinctive, integral, integrated, internal, intimate, intrinsic, inward, latent, native, natural, original, part and parcel, resident, subjective, connate, in the grain, inbuilt, indwelling, running in the family, unalienable |
| Notes: | the word innate means 'inborn' and should apply to living things; inherent is 'essential, intrinsic' and applies best to nonliving things like ideas |
| Antonyms: | acquired, external, extrinsic, incidental, learned, added |
| Main Entry: | key |
| Part of Speech: | adjective |
| Definition: | essential, important |
| Synonyms: | basic, chief, crucial, decisive, fundamental, indispensable, leading, main, major, material, pivotal, primary, principal, vital |
| Antonyms: | insignificant, nonessential, unimportant, inessential |
| Main Entry: | life-and-death |
| Part of Speech: | adjective |
| Definition: | extremely important |
| Synonyms: | consequential, critical, crucial, determining, essential, imperative, important, indispensable, meaningful, paramount, pivotal, serious, significant, urgent, vital, all-important, earth-shaking, earth-shattering, life or death, of vital importance, vitally important |
| Main Entry: | mandatory |
| Part of Speech: | adjective |
| Definition: | required, necessary |
| Synonyms: | binding, commanding, compelling, compulsory, de rigueur, essential, forced, imperative, imperious, indispensable, involuntary, obligatory, requisite, compulsatory, irremissible, needful |
| Antonyms: | optional, unnecessary, voluntary |
| Main Entry: | prerequisite |
| Part of Speech: | adjective |
| Definition: | necessary |
| Synonyms: | essential, expedient, imperative, important, indispensable, mandatory, obligatory, required, requisite, vital, called for, necessitous, needful, of the essence |
| Antonyms: | optional, unnecessary, voluntary |
| Main Entry: | required/requisite |
| Part of Speech: | adjective |
| Definition: | necessary |
| Synonyms: | appropriate, compulsory, deserved, due, enforced, essential, imperative, imperious, indispensable, just, mandatory, needed, obligatory, prerequisite, prescribed, recommended, right, rightful, set, suitable, unavoidable, vital, called for, compulsatory, condign, demanded, needful |
| Antonyms: | nonessential, optional, unnecessary |
| Main Entry: | underlying |
| Part of Speech: | adjective |
| Definition: | fundamental, latent |
| Synonyms: | basal, basic, bottom, cardinal, concealed, critical, crucial, elemental, elementary, essential, hidden, indispensable, intrinsic, lurking, necessary, nitty-gritty*, nub, primary, prime, primitive, radical, root, veiled, vital, bottom-line, needful, substratal |
| Antonyms: | secondary |
* = informal/non-formal usage
| Main Entry: | urgent |
| Part of Speech: | adjective |
| Definition: | needing immediate attention |
| Synonyms: | burning*, capital, chief, clamant, clamorous, compelling, critical, crucial, crying*, demanding, driving, essential, exigent, foremost, heavy*, immediate, imperative, important, importunate, indispensable, insistent, instant, leading, momentous, necessary, paramount, persuasive, pressing, primary, principal, required, salient, serious, touchy*, vital, wanted, weighty*, called-for, demanded, hurry-up, impelling, life and death, top-priority, touch and go |
| Antonyms: | moderate, unimportant, unnecessary |
* = informal/non-formal usage
| Main Entry: | required |
| Part of Speech: | adjective |
| Definition: | necessary |
| Synonyms: | appropriate, compulsory, deserved, due, enforced, essential, imperative, imperious, indispensable, just, mandatory, needed, obligatory, prerequisite, prescribed, recommended, requisite, right, rightful, set, suitable, unavoidable, vital, called for, compulsatory, condign, demanded, needful |
| Antonyms: | optional, inessential |
| Main Entry: | essential |
| Part of Speech: | adjective |
| Definition: | important, vital |
| Synonyms: | capital, cardinal, chief, crucial, foremost, fundamental, imperative, indispensable, leading, main, necessary, needed, prerequisite, principal, required, requisite, wanted, constitutive, necessitous, needful, right-hand |
| Antonyms: | accessory, auxiliary, minor, nonessential, secondary, subsidiary, unimportant, inessential |
| Main Entry: | imperative |
| Part of Speech: | adjective |
| Definition: | necessary |
| Synonyms: | acute, burning, clamant, clamorous, compulsory, critical, crucial, crying, essential, exigent, immediate, important, importunate, indispensable, inescapable, insistent, instant, obligatory, pressing, urgent, vital, no turning back |
| Antonyms: | optional, secondary, unnecessary, voluntary, inessential |
| Main Entry: | integral |
| Part of Speech: | adjective |
| Definition: | necessary, basic |
| Synonyms: | component, constituent, elemental, essential, fundamental, indispensable, intrinsic, requisite |
| Antonyms: | extrinsic, secondary, supplemental, unnecessary |
| Main Entry: | necessary |
| Part of Speech: | adjective |
| Definition: | essential |
| Synonyms: | basic, binding, cardinal, chief, compelling, compulsory, crucial, de rigueur*, decisive, elementary, exigent, expedient, fundamental, imperative, indispensable, mandatory, momentous, needed, obligatory, paramount, prerequisite, pressing, prime, principal, quintessential, required, requisite, significant, specified, unavoidable, urgent, vital, wanted, all-important, bottom-line, incumbent on, name of game, needful |
| Antonyms: | unimportant, unnecessary, useless, inessential |
* = informal/non-formal usage
| Main Entry: | vital |
| Part of Speech: | adjective |
| Definition: | essential |
| Synonyms: | basic, cardinal, critical, crucial, decisive, fundamental, heavy*, imperative, important, indispensable, integral, key, meaningful, name, necessary, needed, nitty-gritty*, prerequisite, required, requisite, significant, urgent, bottom-line, coal-and-ice, constitutive, life-or-death, meat-and-potatoes, name-of-the-game, underlined |
| Antonyms: | trivial, unimportant, inessential, insignficant |
* = informal/non-formal usage
| Main Entry: | material |
| Part of Speech: | adjective |
| Definition: | important, relevant |
| Synonyms: | applicable, apposite, apropos, big, cardinal, consequential, considerable, essential, fundamental, germane, grave, indispensable, intrinsic, key, meaningful, momentous, pertinent, primary, serious, significant, substantial, vital, weighty, ad rem, applicative, pointful |
| Antonyms: | immaterial, irrelevant, unimportant, unsubstantial |
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2009 by the Philip Lief Group.
Cite This Source
Copyright © 2009 by the Philip Lief Group.
Cite This Source
| Main Entry: | need |
| Part of Speech: | noun, verb |
Related
Adjectives: |
instant, absorbing, called for, crying, destitute, equinecessary, essential, exigent, imperative, in demand, in request, in want of, indispensable, inopious, necessary, needful, prerequisite, pressing, required, requisite, urgent
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