categorisation vs classification

categorisation and classification both are nouns.

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

As nouns, categorisation and classification are synonyms defined as:

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

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

As nouns, categorisation and classification are synonyms defined as:

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

Other synonyms of categorisation include categorization, sorting.

As nouns, categorisation and classification are synonyms defined as:

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

Other synonyms of categorisation include categorization.

categorisation (noun)	classification (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	restriction imposed by the government on documents or weapons that are available only to certain authorized people
a group of people or things arranged by class or category	the basic cognitive process of arranging into classes or categories
	a group of people or things arranged by class or category