Flash Game: WordTris

Get into the action of creating words with falling letters in WORDTRIS. Letters drop from the top of the screen, and you must form words horizontally and vertically. When the words form, the letters disappear, and the pace begins to quicken as you complete levels. As the letters continue to descend, look out for the letter to create the magic word that will clear all of the letters from the screen. Test your reflexes and your vocabulary with WORDTRIS. —Flash Game: WordTris (QuickFlashGames.com)

Great little word game.