You can insert the content of previously-created Word documents into a new or different Word document.
Inserting a document
Click where you want to insert the content of the existing document.
On the Insert tab, in the Text group, click the arrow next to Object, and then click Text from File.
In the Insert File dialog box, locate the file that you want, and then double-click it.
To add in the contents of additional Word documents, repeat the above steps as needed.
Important: If you want to insert the header and footer also, be sure to insert the text from the file in a new section so that the header and footer are applied to only those pages.