You cannot close MS Word application by

• Choosing file menu then Exit submenu

• Press ALT + F4

• From file menu choose Close submenu

• Click the X button on the title bar

...

Choosing file menu then Exit submenu

if you have noticed in ms word when we click on file menu then the option we see is "Close" instead of "Exit". So this means we cannot close ms word by using option 1 method.