Synonyms for Assortment (same or very similar meaning)
WordNet sense 1 (a collection containing a variety of sorts of things):
miscellanea, miscellany, mixture, motley, potpourri, smorgasbord, variety, salmagundi, mixed bagWordNet sense 2 (the act of distributing things into classes or categories of the same type):
categorization, classification, compartmentalization, categorisation, compartmentalisationFrom the ODE community, based on WordNetadd/edit