Understanding Scrabble Dictionaries: NWL, CSW, and OSPD Explained

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Scrabble dictionaries like NWL, CSW, and OSPD define which words are valid, but they're not interchangeable. NWL is for North America, CSW covers the rest of the world, and OSPD is a reference for casual play. Knowing the differences can save you from getting a word challenged, whether you're in a tournament or a home game.