1) Allocation 2) Allotment 3) Apportioning 4) Apportionment 5) Assignation 6) Parceling 7) Parcelling 8) Reallocation 9) Reapportionment 1) Reapportionment 2) Reshuffle 
[n] - a new apportionment (especially a reallotment of congressional seats in the United States on the basis of census results)
reapportionment noun a new apportionment (especially a new apportionment of congressional seats in the United States on the basis of census results)