The Oxford Thesaurus An A-Z Dictionary of Synonyms - non-essentialadj.

1) non-vital, unessential, unneeded, unnecessary, needless, inconsequential, insignificant, unimportant, superfluous, dispensable, expendable, gratuitous, uncalled-for, extraneous, peripheral, extra, de trop, adventitious, additional, supplemental, adscititious, redundant, accessory, subordinate, secondary, subsidiary: The non-essential industries were converted to the war effort during the 1940s. --n. 2) unessential, inessential, nonentity, cipher, zero, nobody; extra, supernumerary, spear-carrier, Colloq nothing, Slang US nebbish: She used him as a lackey, a non-essential whom she could dispose of at will.