division

[1]	dividing , split , splitting (up) , breaking up , partition , partitioning , partitionment , separation , separating , diremption , segmentation , segmenting , compartmentation , sectioning , apportioning , apportionment , allotment
[2]	section , part , section , compartment , segment , partition , separation
[3]	branch , department , sector , section , unit , group , arm , part , set , category , class , classification
[4]	boundary (line) , border , borderline , frontier , margin , line , dividing line
[5]	discord , variance , disagreement , upset , conflict , strife , disunity , disunion
[6]	class
[7]	air division
[8]	naval division
[9]	partition , partitioning , segmentation , sectionalization , sectionalisation