Playing word games helps vocabulary stick because they make learning fun and...

https://spellingbee.ninja/trends/why-playing-with-words-can-be-one-of-the-best-ways-to-build-vocabulary/

Playing word games helps vocabulary stick because they make learning fun and interactive. When you guess a word like "deal" in a game, you actively recall its meaning and see it used in context, which helps your brain remember it better