Microsoft Word saves temporary files of your work in progress, so you may be able to get back your document.
How to use AutoRecover files
Word 2010 office.microsoft.com/en-us/word-help/recover-earlier-versions-of-a-file-in-office-2010-HA010356735.aspx
Word 2003 and 2007: support.microsoft.com/kb/827099
Word 2002: support.microsoft.com/kb/316951
Word 2000: support.microsoft.com/kb/316950
Word 7.x: support.microsoft.com/kb/107686
More on file recovery office.microsoft.com/en-us/word-help/CH006083160.aspx
You can try these tips for recovering Mac Word documents
Recover Autosaved docs support.microsoft.com/kb/892956
Recover text from damaged files support.microsoft.com/kb/180871
Recovering Word 2003 files office.microsoft.com/en-us/word-help/about-document-recovery-HP003084115.aspx
Beware of for-pay “word document recovery” programs – some of them can be fakes, or poorly performing generic software re-branded, and some like MacKeeper are borderline malware. For example:
officeformacrecovery(dot)com is all about advertising Mac Word Recovery, but it links to a site selling Windows-only software.
wordrecoverymac(dot)com does not state Word 2010 compatibilty or OSX 10.7 compatibility, they do not disclose the price of the program, and the Buy Now button seems to be non-functional.
Both of the above websites and the YouTube video promoting the wordrecoverymac product are full of factual, grammatical and spelling errors and/or incomplete pages; all of these can be hallmarks of an unprofessional company or a quickly-made website which may be as quick to disappear.
I would stick with investigating only the programs that have been checked and listed at C|Net Download.com such as
download.cnet.com/officesalvage/3000-2242_4-10487562.html
download.cnet.com/uFlysoft-Data-Recovery/3000-2094_4-75628228.html?tag=api
download.cnet.com/Disk-Drill/3000-2094_4-75307728.html?tag=mncol;1
download.cnet.com/DDR-Recovery-Software/3000-2094_4-75631176.html?tag=api