Crosswhords!

In Crosswhords! players cooperatively construct a barred crossword, a crossword where heavy lines drawn along grid squares separate words instead of black squares. Players start with an empty grid. They devise a list of categories and then enter a word or phrase in the middle of the grid. On your turn, you think of a word that fits in one of the categories and in the grid. If the other players guess your word, you write it down in the grid. If not, you give the other players a clue by writing a related word in the grid. Everyone wins if there's a word or phrase in the grid for each of the categories. —description from the designer