I've never used it, but Word 2013 has "Insert" "Object" and for "Create New" includes "AutoCAD Drawing" as a choice. I can't remember which version of Word started this, but I know it's been there for a while now.
It has option to insert from file, so if you can create drawing from new, it should insert drawing from file.
Whether or not it updates (like an xref or not), I do not know.
Experiment and explore!