The Collaborative International Dictionary of English v.0.48:

Necessary \Nec"es*sa*ry\, n.; pl. Necessaries.
   1. A thing that is necessary or indispensable to some
      purpose; something that one can not do without; a
      requisite; an essential; -- used chiefly in the plural;
      as, the necessaries of life.
      [1913 Webster]

   2. A privy; a water-closet.
      [1913 Webster]

   3. pl. (Law) Such things, in respect to infants, lunatics,
      and married women, as are requisite for support suitable
      to station.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "necessaries":
   bare necessities, call for, demand, demand for, desideration,
   desideratum, essential, essentials, indispensable, must, must item,
   necessities, necessity, need, need for, occasion, prerequirement,
   prerequisite, requirement, requisite, requisition, the necessary,
   the needful, want