Another complicating factor is whether you download the file or a page, print a page, or sign up for an emailed download. All three work, but some form of file will be most flexible. Usually you have to pay for that.
At some point in their lives, the majority of people have probably come across word search puzzles. Basically these puzzles are a grid of letters containing various words placed in all types of directions (from left to right, from right to left, up and down the page, and in each of the various diagonal directions). Additionally, the words can overlap too, and any unused squares in the grid are filled with a randomly chosen letter.