1) Appraisal 2) Ascription 3) Assessment 4) Attribution 5) Categorisation 6) Classification 7) Description 8) Dichotomy 9) Duality 10) Indexing 11) Reclassification 12) Stratification 13) Taxonomic 14) Taxonomical 15) Typology 1) Arrangement 2) Cataloguing 3) Categorisation 4) Classification 5) Organization 6) Sorting 7) Taxonomy 
Categorization is the process in which ideas and objects are recognized, differentiated, and understood. Categorization implies that objects are grouped into categories, usually for some specific purpose. Ideally, a category illuminates a relationship between the subjects and objects of knowledge. Categorization is fundamental in language, predict...
(kat″ĕ-go-rĭ-za´shun) the identification of similarities and differences among pieces of received information.
[n] - the act of distributing things into classes or categories of the same type
categorisation noun the act of distributing things into classes or categories of the same type
The natural cognitive process of grouping and labeling people, things, etc. based on their similarities. Categorization becomes problematic when the groupings become oversimplified and rigid (e.g. stereotypes).
the basic cognitive process of arranging into classes