General terms:
* Genre: This is the most common and widely understood term. It refers to the classification of fictional works based on shared characteristics such as plot, characters, setting, and themes.
* Classification: This term is more formal and can be used in academic or library settings. It emphasizes the systematic arrangement of fiction into categories.
* Categorization: This term is similar to "classification" but is more general and can be used for any type of grouping.
More specific terms:
* Genrefication: This term is less common but emphasizes the process of assigning a genre to a fictional work.
* Taxonomizing: This term is more academic and refers to the scientific classification of things. It can be used to describe the process of categorizing fiction in a more structured way.
Ultimately, the best word to use will depend on the specific context and what you want to emphasize.