We have found 2 software records in our database eligible for .epub to .docx file format conversion.
Texts from ePUB ebooks can be exported and saved as separate documents which can be then edited using a text editor or word processing tool.
For example, you can use Calibre e-books management software for Windows, Mac and Linux to convert .epub e-books to Word documents (.doc, .docx.). But sadly Calibre can only export to HTMLZ.
Once you have it, rename .htmlz file extension to .zip, unpack the .zip archive and import index.html file to Microsoft Word.
On OS X you can use Pages, because it supports ePUB format in the latest version.
EPUB
The file extension epub is used by e-books in Open Publication structure eBook format. Since 2007, the EPUB format has been regarded as an international standard. It is generally used for text-centric books or other publications.
DOCX
Files with docx extension are documents written and saved using Microsoft Word word processor edition 2007 or later. DOCX format replaced the previously used DOC format, moving from binary files to Open XML schema-based documents. They are supported in almost every modern word-processing tools.