Nearly 3000 additional words have been added to the official scrabble words list.

Robert Groves, editor of Collins English Dictionaries said: "The latest edition adds nearly 3,000 new words to the existing quarter of a million available to Scrabble players. These additions are an eclectic mix of new technological jargon, overseas English, recent colloquialisms, street slang, and a few phrases that had not made it on to the list until now."
Source-Medindia