I just updated this game making it more thorough and adding more words to the puzzle game. This is just a fun way to review the synonyms with your students.
Students need to learn as much vocabulary as possible and I have learned through experience that students love to make puzzles and play with their partners.
To make the game different from the Antonym Puzzle Game, I have done this one in blue; just in case you buy them both and the students get confused. On the other hand, you can correlate them and ask the students to find the synonym as well as the antonym.