categorization vs categorisation

categorization and categorisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
categorization	Yes	No	No	No
categorisation	Yes	No	No	No

As nouns, categorization and categorisation are synonyms defined as:

categorization and categorisation: the act of distributing things into classes or categories of the same type

Other synonyms of categorization include assortment, classification, compartmentalisation, compartmentalization.

As nouns, categorization and categorisation are synonyms defined as:

categorization and categorisation: the basic cognitive process of arranging into classes or categories

Other synonyms of categorization include classification, sorting.

As nouns, categorization and categorisation are synonyms defined as:

categorization and categorisation: a group of people or things arranged by class or category

Other synonyms of categorization include classification.

categorization (noun)	categorisation (noun)
the act of distributing things into classes or categories of the same type	the act of distributing things into classes or categories of the same type
the basic cognitive process of arranging into classes or categories	the basic cognitive process of arranging into classes or categories
a group of people or things arranged by class or category	a group of people or things arranged by class or category