I would like to assist your with this .
Please can reply and provide me full details of the computer , OSX version , Mac model number , part number , age , any additional extras like memory that was installed and the screen size of the imac or laptop if possible.
I need to know exactly what Mac you are using?
You can collect much of this info on the Mac via the Apple menu , About this Mac , More info .
It seems the Word application has crashed , you can see if the Application has crashed by pressing this combination of keys :-
Apple or clover leaf , alt + escape in one key stroke.
Crashed or busy Applications will be stated as "not responding"
If time has passed and the Application is still "not responding " it it likely that it will not recover . You can also see more information within the Activity monitor , found in Application / utilities folder on your Mac HD.
Use the Force quit options to quit the program selected in the list .
You will in most cases loose your open document and work within the application you force quit , in this case "Word ".
I would recommend you update your Word or Microsoft office to the latest version or using iwork
as an alternative save as Word document files if needed .
I hope this helps.