What are some alternative words for necessary?

Synonyms for necessary
ˈnɛs əˌsɛr i

This thesaurus page is about all possible synonyms, equivalent, same meaning and similar words for the term necessary.

Princeton's WordNet

  1. necessity, essential, requirement, requisite, necessary(adj)

    anything indispensable

    "food and shelter are necessities of life"; "the essentials of the good life"; "allow farmers to buy their requirements under favorable conditions"; "a place where the requisites of water fuel and fodder can be obtained"

    essential, demand, requirement, requisite, necessity, prerequisite

    supererogatory, uncalled-for, avoidable, evitable, surplus, superfluous, spare, extra, avertible, excess, unnecessary, gratuitous, avertable, inessential, unneeded, needless, supernumerary, redundant

  2. necessary(adj)

    absolutely essential

    supererogatory, extra, inessential, surplus, redundant, superfluous, excess, spare, supernumerary, avertable, evitable, avertible, uncalled-for, needless, gratuitous, unnecessary, unneeded, avoidable

  3. necessary(adj)

    unavoidably determined by prior circumstances

    "the necessary consequences of one's actions"

    spare, supererogatory, avoidable, excess, superfluous, extra, avertable, inessential, unneeded, surplus, uncalled-for, evitable, unnecessary, needless, redundant, gratuitous, supernumerary, avertible


  1. necessary(noun)


  2. necessary(adjective)

    needed, required


English Synonyms and Antonyms

  1. necessary

    That is necessary which must exist, occur, or be true; which in the nature of things can not be otherwise. That which is essential belongs to the essence of a thing, so that the thing can not exist in its completeness without it; that which is indispensable may be only an adjunct, but it is one that can not be spared; vigorous health is essential to an arctic explorer; warm clothing is indispensable. That which is requisite (or required) is so in the judgment of the person requiring it, but may not be so absolutely; thus, the requisite is more a matter of personal feeling than the indispensable. Inevitable (Latin in, not, and evito, shun) is primarily the exact equivalent of the Saxon unavoidable; both words are applied to things which some at least would escape or prevent, while that which is necessary may meet with no objection; food is necessary, death is inevitable; a necessary conclusion satisfies a thinker; an inevitable conclusion silences opposition. An infallible proof is one that necessarily leads the mind to a sound conclusion. Needed and needful are more concrete than necessary, and respect an end to be attained; we speak of a necessary inference; necessary food is what one can not live without, while needful food is that without which he can not enjoy comfort, health, and strength.

    essential, indispensable, inevitable, infallible, needed, needful, required, requisite, unavoidable, undeniable

    casual, contingent, needless, non-essential, optional, unnecessary, useless, worthless

    Necessary to a sequence or a total; for or to a result or a person; unity is necessary to (to constitute) completeness; decision is necessary for command, or for a commander.

Complete Dictionary of Synonyms and Antonyms

  1. necessary

    certain, inevitable, indispensable, requisite, essential, compulsory, needful, expedient

    contingent, casual, optional, discretional, unnecessary, unessential, free

Dictionary of English Synonymes

  1. necessary(a.)

    inevitable, unavoidable, that must be, not to be avoided

  2. necessary(a.)

    requisite, essential, indispensable, needful, that cannot be spared

  3. necessary(a.)

    involuntary, not free

  4. necessary(n.)

    requisite, requirement, necessity, essential, indispensable thing, SINE QUA NON

  5. necessary(n.)

    privy, jakes, water-closet, back-house

Synonyms, Antonyms & Associated Words

  1. necessary(a)

    requisite, essential, needed, needful, indispensable inevitable, unavoidable

    nonessential, unnecessary, optional, discretional, casual, needless

  2. necessary(n)

    requisite, requirement, essential, sine qua non

Concise Medical Dictionary, by Joseph C Segen, MD

  1. necessary

    See Medically necessary, Necessary dental service or supply

How to pronounce necessary?

US English

How to say necessary in sign language?

  1. necessary

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How to use necessary in a sentence?

  1. Peter McWilliams:

    The more severe the pain or illness, the more severe will be the necessary changes. These may involve breaking bad habits, or acquiring some new and better ones.

  2. Ira Mehlman:

    It’s a huge danger. The numbers make it difficult to do the kinds of vetting that’s necessary and just the circumstances in Islamic State-occupied Syria and other countries, it’s impossible to do the big checks necessary, all while we have ISIS and other groups telling us they intend to infiltrate operatives through the refugee process.

  3. Moon Jae-in:

    For peace of the Korean Peninsula, (I will) constantly be working, if it is necessary, I will fly immediately to Washington and also visit Beijing and Tokyo. If the condition is created, I will also go to Pyongyang.

  4. Mark Twain:

    Work is a necessary evil to be avoided.

  5. New York:

    Public safety is paramount, and I want the people of this state to know that we are working with all local and federal partners, remaining vigilant and taking all necessary measures to keep New Yorkers safe.

Translations for necessary

From our Multilingual Translation Dictionary

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  1. necessary

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