categorisation vs sorting

categorisation and sorting both are nouns.

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

As nouns, categorisation and sorting are synonyms defined as:

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

Other synonyms of categorisation include categorization, classification.

categorisation (noun)	sorting (noun)
the act of distributing things into classes or categories of the same type	grouping by class or kind or size
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	an operation that segregates items into groups according to a specified criterion