By default Word search will try to fit as many words as possible in a grid.
You also have the option to limit the number of words, in case you want to have only a few words in a grid, and plenty of “noise” (random letters).
Puzzle Maker Pro – Word Search will allow you to set the number of words to unlimited, or to a certain limit. Please be aware that this is a maximum number, depending on the number, the grid size and the word list. In some cases it’s just not possible to fit the required number of words in the grid.