(n)kind, sort, form, varietya category of things distinguished by some common characteristic or quality“sculpture is a form of art”, “what kinds of desserts are there?”
(n)sort, sortingan operation that segregates items into groups according to a specified criterion“the bottleneck in mail delivery is the process of sorting”
(v)classify, class, sort, assort, sort out, separatearrange or order by classes or categories“How would you classify these pottery shards--are they prehistoric?”