WordNet (r) 3.0 (2006):

zoning
    n 1: dividing an area into zones or sections reserved for
         different purposes such as residence and business and
         manufacturing etc

Moby Thesaurus II by Grady Ward, 1.0:

65 Moby Thesaurus words for "zoning":
   Eighteenth Amendment, Prohibition Party, Volstead Act, abstraction,
   alienation, ban, contraband, denial, detachment, disallowance,
   disarticulation, disassociation, disconnectedness, disconnection,
   discontinuity, disengagement, disjointing, disjunction,
   dislocation, disunion, division, divorce, divorcement, embargo,
   exclusion, forbiddance, forbidden fruit, forbidding, incoherence,
   index, index expurgatorius, index librorum prohibitorum,
   inhibition, injunction, interdict, interdiction, interdictum,
   isolation, law, luxation, no-no, parting, partition, preclusion,
   prevention, prohibition, prohibitory injunction, proscription,
   refusal, rejection, removal, repression, restrictive covenants,
   ruling out, segmentation, separation, separatism, statute,
   subdivision, subtraction, sumptuary laws, suppression, taboo,
   withdrawal, zoning laws