Here are some options, depending on the specific context:
Formal:
* Archive: A collection of historical documents or records.
* Collection: A group of documents, often with a common theme or purpose.
* Dossier: A set of documents containing detailed information about a particular person, subject, or event.
Informal:
* Pile: A casual term for a large number of documents.
* Stack: Similar to a pile, but often implies a more organized arrangement.
* Bundle: A collection of documents tied or wrapped together.
The best option depends on the specific context and desired tone.