Sounds like your menus have gone glitchy for some reason. Those commands
are missing?
First, make sure you didn't accidentally turn on "Word 5.1 Menus". Look
under View to see if there's a check next to that option. If that isn't
the problem:
If you go to Tools | Customize Toolbars/Menus, select the Menu Bar, and
click Reset, it should set all your main menus and built-in toolbars
back to the default.
If you have customized your menus or toolbars, you may want to explore
the Tools | Customize, Commands dialog, and drag the commands you are
missing back to the toolbars/menus yourself, rather than wipe out your
customizations by clicking Reset.