Synset

an organized structure for arranging or classifying
<noun.cognition>   freq. cnt.: 24 freq. cnt.: 12 freq. cnt.: 8 freq. cnt.: 4

arrangement

organisation

organization

system

sample sentences

"he changed the arrangement of the topics"
"the facts were familiar but it was in the organization of them that he was original"
"he tried to understand their system of classification"