How can I unstick a game of Words With Friends?

I've had this problem before too, never really looked into how to solve it, but now that I think about it.

Wiping the application data for words with friends (Settings -> Applications -> Manage Applications -> Words Free -> Clear Data), then starting the application again (requiring you to log in since you wiped the data) should refresh your game.

As I was typing the above I saw that there's a "clear cache" button below the "clear data" button. That might solve the issue too. Clearing the cache would empty what is there and force a refresh from the servers. If clearing the cache doesn't work, the the paragraph above should solve the problem.

I had a somewhat different problem where there's an "Oops" message and that particular game disappears from the Android phone. To work around it I logged on using a PC to finish that round.

Not the greatest solution, but better than remove/reinstall.

Also....I terminated without removing the app, which also fixed my problem. This is under settings....apps....Words With Friends. May as well clear data and cache while you're there. This also took care of players' names who were numbers.

After trying everything suggested by @Sorean my game was still stuck. I ended up having to uninstall the game entirely then reinstall it. That synched the game up to its correct state.