noun (n)

• a collection containing a variety of sorts of things(noun.group)

  Example:
  A great assortment of cars was on display.
  

  Synonym:
  miscellanea, miscellany, mixed bag, mixture, motley, potpourri, salmagundi, smorgasbord, variety
  

  source: wordnet30
• the act of distributing things into classes or categories of the same type(noun.act)

  Synonym:
  categorisation, categorization, classification, compartmentalisation, compartmentalization
  

  source: wordnet30
• Act of assorting, or distributing into sorts, kinds, or classes.(noun)

  source: webster1913