I don't have empiric data, but my guess (which I hope is an educated one) will be that a book contains more words than a movie.
The reason for that is that a book has to use words to describe the settings, the location of the plot, the physical appearance of the characters, etc. A movie, on the other hand, doesn't need to use verbal language in order to give the audience information of that sort. It uses, instead, visual language.
For instance: In Tolkien's "Lord of the Rings", a fair amount of words is used to describe the appearance of hobbits. In the movie, not a single word is used for that purpose, and the audience understands what hobbits look like from seeing them on the screen.
By the way, you can probably check this by opening a play or a screen play and compare the number of words per page with the number of words per page in a novel.