OK, this is the type of detail we need in order to narrow things down

It
does sound like there is a problem with the Menu, itself. The first
corrective measure to try is relatively simple:
1- Go to View> Customize Menus & Toolbars, Toolbars page
2- Click on the name of the 'Menu Bar' then click the 'Reset' button
3- Click 'OK', then Quit Word
See whether the menu is put right once you launch Word again. If not there
are additional steps to take, but that often corrects such issues. Just
avoid any temptation to "re-install Office" -- that frequently causes more
problems than it cures & just wastes a lot of time.
Should that not correct the menu, launch Word while holding the Shift key &
indicate when you reply whether the menu is filled in... But that isn't a
'fix', it's just a troubleshooting technique.
HTH |:>)
Bob Jones
[MVP] Office:Mac