There were a couple of word games that the participants on the Business Objects board (BOBJ) would play that were entertaining.
One was "How Many Words" where you try to find words inside another word...their current word is TRANSMOGRIFICATION with 361 words so far!
The other one, which might be easier to play while on the road, was a letter game where you started with one word, and the next person had to modify the word by adding one new letter, removing one letter, or changing one letter (and only ONE letter!). There was a limit on how short or long the resulting word could be (IIRC, 3-6 characters), and you could only use "real English" words that weren't coloquialisms or purely regional (that caused some debate sometimes!), and no proper names. No duplicates. There were probably other rules that I can't remember, but it was challenging. The game ended when there weren't any other possible variations. A later variation was to see how many words you could get, then loop back around to the original word without duplicating a previous posting.