Any EA source can be added into any Word document with eaDocX
Open any existing Word document, wherever and however it was created, and just like in a new eaDocX document, add in the EA material of your choice. (link to new article Building documents with Sections). Then generate your document.
The original Word content will be saved, unchanged, along with the new EA generated Sections.
You can add a single diagram, a whole package structure, a matrix, a report, or maybe just a glossary. And you can add as many eaDocX sections as you want.