What is another name for categories?

There are many synonyms for "categories," depending on the context. Here are a few examples:

General:

* Classes

* Groups

* Types

* Divisions

* Classifications

* Kinds

* Sorts

Specific:

* Genres (for books, movies, music, etc.)

* Taxonomies (for biological classification)

* Domains (for website organization)

* Fields (for academic disciplines)

* Sectors (for industries)

The best synonym to use will depend on the specific situation and the intended meaning.