Categorisation and Taxonomy

Categorisation noun - The basic cognitive process of arranging into classes or categories.

Taxonomy and categorisation are semantically related. In some cases you can replace term "Taxonomy" with "Categorisation", this nouns are similar.

Taxonomy noun - Practice of classifying plants and animals according to their presumed natural relationships.

Categorisation and taxonomy are semantically related. Sometimes you can use "Categorisation" instead a noun "Taxonomy".