As far as I know, there is no way to "globally" turn off keyboard shortcuts
in Word.
What you can do is remove the specific shortcuts that you don't want. For
that purpose, use the Customize Keyboard dialog box (Office button | Word
Options, Customize: Click the Customize button).
However, instead of changing the keyboard shortcuts, I would recommend
making use of Undo whenever you make a mistake. For example, if you delete
something accidentally, click the Undo button on the Quick Access Toolbar.
There is actually a very useful keyboard shortcut (!) that you can use:
Ctrl+Z.
