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For finding the fun in building vocabulary. This games startup has created such educational titles as xWords, which includes a variety of crossword puzzles, and Word Joust, a vocabulary-building game that students can play solo or in competition. This first Word Joust is built around 3,000 SAT-type words. Ten thousand students in Singapore (soon rising to 40,000) are playing an experimental, browser-only version called Word Kungfu based on elementary school word lists.FCS