Pocket Thesaurus
Antonyms of unnecessary
worthless, needless, superfluous, gratuitous, redundant, useless, avoidable, unneeded, irrelevant, futile, accidental, additional, beside the point, casual, chance, dispensable, excess, exorbitant, expendable, extraneous, extrinsic, fortuitous, haphazard, lavish, nonessential, optional, prodigal, profuse, random, surplus, uncalled-for, uncritical, undesirable, unessential, wanton, inessential, supererogatory, unrequired, noncompulsory
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