categorization vs assortment

categorization and assortment both are nouns.

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

As nouns, categorization and assortment are synonyms defined as:

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

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

categorization (noun)	assortment (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	a collection containing a variety of sorts of things
a group of people or things arranged by class or category