Pigeonholing
Part of speech: noun
Definition: the classification of disparate entities into categories, not always for the right reason
Part of speech: verb
Definition: To categorize; especially to limit or be limited to a particular category, role, etc.
Grouping
Part of speech: noun
Definition: A collection of things or people united as a group.The action of the verb to group.
Part of speech: verb
Definition: To put together to form a group.