What is a group of Categories called?

A group of categories is commonly called a List. Other collective nouns you may see include Chart.

Collective nouns are words that are used specifically to refer to a group or collection of things, animals, or people. However, in the case of categories, collective nouns take on a different meaning. They are nouns that refer to a broad group or class of similar items or concepts. In the realm of categories, collective nouns serve as a way to bring together numerous objects, ideas, or entities under a single term, enabling a more efficient and concise way to communicate. Instead of listing each item individually, a collective noun allows us to encompass them all within a single word or phrase, emphasizing their shared characteristics or common purpose. For example, "fruit" is a collective noun that encompasses a vast range of edible, typically sweet or tangy products that come from plants. It covers various individual types of fruits, such as apples, bananas, oranges, and berries, bringing the diversity within this category under one idea. Similarly, the collective noun "vehicles" encompasses diverse transportation machines, including cars, trucks, motorcycles, airplanes, trains, and boats. By using this collective term, we can easily express and understand the wide variety of ways we can travel and transport goods. Moreover, collective nouns for categories can also represent intangible concepts or fields of study, like in the case of "sciences" for the vast range of disciplines that deal with systematic knowledge of the physical or material world or ideas related to society, such as psychology, biology, physics, sociology, and economics. Ultimately, collective nouns for categories simplify communication by grouping various items or concepts into a more streamlined term, allowing us to express their shared characteristics or shared purpose without having to mention each component individually.