subsumption vs categorisation

subsumption and categorisation both are nouns.

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

As nouns, categorisation is a hypernym of subsumption; that is, categorisation is a word with a broader meaning than subsumption:

subsumption: incorporating something under a more general category
categorisation: the basic cognitive process of arranging into classes or categories

Other hypernyms of subsumption include categorization, classification, sorting.

subsumption (noun)	categorisation (noun)
incorporating something under a more general category	the act of distributing things into classes or categories of the same type
the premise of a syllogism that contains the minor term (which is the subject of the conclusion)	the basic cognitive process of arranging into classes or categories
	a group of people or things arranged by class or category