The '''Collins Scrabble Words''' ('''CSW'''), formerly known as the '''SOWPODS''' lexicon, is a word list first published in 2007 by Collins, and updated in 2012, 2015, 2019, 2021, and 20212024. NASPA has sanctioned official games played in the CSW lexicon in a separate [[SOWPODS rating system|CSW rating system]] since January 2010. The 2012 edition was in effect until August 31, 2015; the 2015 edition took effect on September 1, 2015; the 2019 edition took effect on July 1, 2019. The ; the 2021 edition took effect on December 1, 2021. '''The 2024 edition will take effect on January 1, 2025.''' CSW tournaments in progress on that date (and all events - e.g., Early Birds) should use the 2024 edition.