A keyboard is a "board" with keys on it. So a keyboard key is called a, "Keyboard key". There is no fancier word for them.
Why the window key in keyboard?
Yes, there is an 'enter' key on the keyboard.
COMPUTER KEYBOARD KEY MEANINGS
key board controller
If your keyboard is missing a key, press the key-less spot very lightly when used, or try to place the key back on, or at best get a new keyboard.
The @ key is at the top left on your keyboard, on the same key as '2'. By pressing both the Shift key and the '2' key, you'll get: @
It is usually on the key above the Enter (or Return) key on the keyboard.
To make an apostrophe on a keyboard, press the key beside the "enter" key on the right hand side of the keyboard.
it alters the key functions of the keyboard
there is no option key