One who, or that which, categorizes.

plural of categorizer

Third-person singular simple present indicative form of categorize

(transitive) To assign a category; to divide into classes.

simple past tense and past participle of categorize

The characteristic of having been placed or sorted in a category or categories.

The quality of being categorical.

categorical

plural of categorization

A group of things arranged by category; a classification. / The process of sorting or arranging things into categories or classes.