Games useful for speech therapy

I have a good friend who suffered head injuries in a recent accident and is now in rehab. He is clearly able to understand what people are saying to him and can respond with gestures. He is able to write intelligibly. He can respond with short phrases and uses simpler common ones like "hello", "yes", "no" and "thank you" correctly. Longer sentences, however, are somewhat problematic. He produces syntactically correct and logically consistent sentences, but his choices of words and phrases are rather unusual. I don't know if doctors would call what he has aphasia, or not, but he is getting speech therapy.

It has been suggested that games could help him. I've put the best few games that I could think of to start this list. Please add your own recommendations, keeping in mind that any additions should probably be word games that involve speaking. I'd also appreciate thumbs and comments to keep this list visible on the front page so that more people will see it to contribute to it.