Add one or more letters to a word already on the board.
Example: "HARM", "ARMED", "CHARMED", "ARMS".
Place a word at right angles to a word already on the board.
The new word must use at least one of the letters already on the
board or must add a letter to a word or words on the board.
Example:
A
H ARM or ARM
A I
D D
Place a complete word parallel to a word already played,
so that adjoining letters also form complete words.