File>Save As, open the list of file types at the bottom of the dialog
window. You *won't* find any WP formats there, but there are some that may
help depending on the nature of the doc & the version of WP. The ones to
consider are Rich Text Format (*.rtf) and Word 97-2003 & 6.0/95 - RTF
(*.doc).
There are also 3rd-Party converter apps on the market as well as filters
available from the 'file converter downloads' posted here:
http://gmayor.com/downloads.htm
Just keep in mind that neither option is going to render the document with
100% accuracy.