html2docx utilizes Microsoft Word's ability to convert HTML to DOCX.
Disclaimer - The files generated by this utility only work in Microsoft Word and are not compatible with other word processing variants (OpenOffice, etc.)
cd path/to/html2docx
# Dependencies
./install_apt_requirements
# Build
xbuild /p:Configuration=Release
# Usage
cd html2docx/bin/Release
mono html2docx.exe inputfile.html outputfile.docx