Bluetooth keyboard required. Word's keyboard shortcuts on Android only activate with a Bluetooth keyboard connected.
Ctrl modifier. Word on Android uses Ctrl as the primary modifier, consistent with the Windows and web versions of Word, and different from the Command modifier used on iPhone.
Shortcut scope. The Android shortcut set covers text formatting (Ctrl+B, Ctrl+I, Ctrl+U), basic document navigation, and editing. As with the iPhone version, advanced desktop features are not available in the Android app.
Android tablets. Word on Android is more commonly used with a keyboard on a tablet than on a phone. The shortcut set is the same regardless of device.