When you want to discuss a group of items or ideas that belong together, you might use the term "including categories" to indicate that you are including all relevant categories in your discussion. However, there are many other synonyms that can be used to express this same idea. Some alternatives include "including types," "encompassing classifications," "taking in genres," "accounting for classes," and "embracing divisions." By using different terminology to convey the same message, you can keep your writing fresh and interesting while still communicating your intended meaning clearly.