High Quality Content by WIKIPEDIA articles! Official Tournament and Club Word List or Tournament Word List, referred to as OTaCWL, OWL, or TWL, is the official word authority for tournament Scrabble in the USA, Canada and Thailand. It is based on the Official Scrabble Players Dictionary (OSPD) with modifications to make it more suitable for tournament play. Its British counterpart is Chambers Official Scrabble Words, and the combination of the two word lists is known as SOWPODS.