Collins word list
There are no deletions of existing words.
The transition from the 2015 version of the Collins Scrabble Tournament & Club Word List (hereinafter referred to as CSW15) to the 2019 version (hereinafter referred to as CSW19) involves 2862 new words in total, of which 1258 of length 2 to 9 letters, with 617 of length 2 to 8 letters. The transition from the 2012 version of the Collins Scrabble Tournament & Club Word List (hereinafter referred to as CSW12) to the 2015 version (hereinafter referred to as CSW15) involves 6500 new words in total, of which 4171 are of length 3 to 9 letters (there are no new 2-letter words).