WordNet (r) 3.0 (2006):

rationing
    n 1: the act of rationing; "during the war the government
         imposed rationing of food and gasoline"

Moby Thesaurus II by Grady Ward, 1.0:

46 Moby Thesaurus words for "rationing":
   apportionment, arrest, arrestation, budgeting, check, constraint,
   control, cooling, cooling down, cooling off, curb, curtailment,
   cutting, cutting the pie, deceleration, dividing, division, divvy,
   hindrance, inhibition, injunction, interdict, legal restraint,
   monopoly, parceling, partition, partitioning, portioning,
   prohibition, protection, protectionism, protective tariff, rein,
   repartition, restraint, restraint of trade, retardation,
   retrenchment, self-control, sharing, sharing out, slicing,
   slowing down, splitting, tariff wall, thought control