A family of Microsoft word processing software products for creating web, email, and print documents.
There is not much information I found, but it seems that Word is attempting to access a file that is being copied by Time Machine (the "another process").
Try setting up a work folder for your currenly-in-use files, then exclude it from Time Machine.
For safety, enable the backup option in Word > Preferences > Save. It's safer and more useful than AutoRecover.
And if you use the latter, set it for a longer interval (never 1 minute) and also exclude this folder: YOUR_USER_NAME (i.e., your home folder)/Documents/Microsoft User Data/Office 2011 AutoRecovery (this is where Word saves by default its AutoRecovery files).