Given that the average English dictionary has 80,000 words and there are in excess of 150,000 words in the English language. Your version of the game is set for difficulty if not downright failure. Even zener card number only 25 and there you're only trying to guess a symbol.
Reverse the game. Get the person to say the word you try and guess its position in the book. Left or right page, left or right column, top bottom, how many words from the top or bottom for example. Correctly guessing that the word is on the right page in the right column near the top is a feat in itself. So don't worry about guessing page numbers just the position of the word on the page.
Alex
