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necessary

 - 10 of 35 thesaurus results
Main Entry: necessary
Part of Speech: adjective
Definition: essential

Synonyms:

all-important, basic, binding, bottom-line, cardinal, chief, compelling, compulsory, crucial, de rigueur, decisive, elementary, exigent, expedient, fundamental, imperative, incumbent on, indispensable, mandatory, momentous, name of game, needed, needful, obligatory, paramount, prerequisite, pressing, prime, principal, quintessential, required, requisite, significant, specified, unavoidable, urgent, vital, wanted

Antonyms:

inessential, unimportant, unnecessary, useless
Main Entry: necessary
Part of Speech: adjective
Definition: inevitable

Synonyms:

assured, certain, fated, imminent, ineluctable, ineludible, inerrant, inescapable, inevasible, inexorable, infallible, returnless, unavoidable, undeniable, unescapable

Antonyms:

contingent, needless, optional, voluntary
Main Entry: automatic
Part of Speech: adjective
Definition: occurring as natural consequence

Synonyms:

assured, certain, inescapable, inevitable, necessary, routine, unavoidable

Antonyms:

stilted, unnatural
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, substratal, underlying, vital

Antonyms:

additional, extra, inessential, nonessential, outside, peripheral, secondary
Main Entry: compulsory
Part of Speech: adjective
Definition: binding

Synonyms:

compulsatory, de rigueur, forced, imperative, imperious, mandatory, necessary, obligatory, required, requisite

Antonyms:

free, liberalized, liberated, optional, unstipulated, voluntary
Main Entry: crucial
Part of Speech: adjective
Definition: critical, important

Synonyms:

acute, central, clamorous, climacteric, climatic, compelling, deciding, decisive, desperate, dire, essential, hanging by thread, high-priority, imperative, insistent, momentous, necessary, on thin ice, pivotal, pressing, searching, showdown, touch and go, touchy, urgent, vital
Notes: the words crucial, essential, and vital cannot be qualified (cannot be more or less...)

Antonyms:

inessential, trivial, uncritical, unimportant
Main Entry: deciding
Part of Speech: adjective
Definition: determining

Synonyms:

chief, conclusive, critical, crucial, decisive, important, influential, key, necessary, prime, principal, significant

Antonyms:

inconclusive, insignificant, secondary, trivial, uncritical, unimportant
Main Entry: de rigeur
Part of Speech: adjective
Definition: proper, right

Synonyms:

au fait, becoming, comme il faut, conventional, correct, decent, decorous, done, fitting, necessary, required

Antonyms:

improper, wrong
Main Entry: essential
Part of Speech: adjective
Definition: important, vital

Synonyms:

capital, cardinal, chief, constitutive, crucial, foremost, fundamental, imperative, indispensable, leading, main, necessary, necessitous, needed, needful, prerequisite, principal, required, requisite, right-hand, wanted

Antonyms:

accessory, auxiliary, inessential, minor, nonessential, secondary, subsidiary, unimportant
Main Entry: exigent
Part of Speech: adjective
Definition: urgent, pressing

Synonyms:

acute, burning, clamant, clamorous, constraining, critical, crucial, crying, imperative, importunate, insistent, instant, menacing, necessary, needful, threatening

Antonyms:

ordinary, unpressured, usual
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