This article may interest you, if when you open Word 2008 for Mac or Word for Mac 2011, you try to launch a document and the program stops responding.
Additionally, you may have to use the Force Quit command to quit Word for Mac.
To resolve this issue, Microsoft KB2027101 recommends you try the following troubleshooting steps:
1. Clear the Auto Recovery folder
2. Download and Install the latest update
3. Check document name
4. Remove Word Preferences
5. Try in Safe Mode
6. Use of Third party fonts