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NASPA Word List (NWL, formerly Official Tournament and Club Word List, referred to as OTCWL, OWL, TWL) is the official word authority for tournament Scrabble in the USA and Canada under the aegis of NASPA Games. [1] It is based on the Official Scrabble Players Dictionary (OSPD) with
Collins Scrabble Words (CSW, formerly SOWPODS) is the word list used in English-language tournament Scrabble in most countries except the US, Thailand and Canada, [1] although Scrabble tournaments in the US and Canada are also organized with divisions that use Collins Scrabble Words as their lexicon, some under the auspices of organizations such as the Collins Coalition.
Although OSPD bears the name Official Scrabble Players Dictionary, no country’s competitive organization lists the OSPD as its official dictionary; the NASPA Word List is the official word list for tournament Scrabble in the United States, Canada, Thailand and Israel. [2] Merriam-Webster markets the OSPD as ideal for school and family use.
Scrabble is a word game in which two to four players score points by placing tiles, each bearing a single letter, onto a game board divided into a 15×15 grid of squares. The tiles must form words that, in crossword fashion, read left to right in rows or downward in columns and are included in a standard dictionary or lexicon.
The official lexicon is the NASPA Word List. When a player challenges a word, if the word is not in the lexicon it is removed from the board with a score of zero. If the word is in the lexicon, the player who challenged the word loses a turn. Scrabble clubs meet on a regular basis, usually weekly or biweekly at the same venue.
In an agreement with Mattel's predecessor, J. W. Spear & Sons, the Chambers Dictionary was, for several decades, the official source of words for the book Official Scrabble Words (OSW), a lexicon of all words and inflections playable in tournament Scrabble within the UK and other countries such as New Zealand and Australia.
Common words present in two or more published dictionaries COMPOUND.TXT 256,772 Phrases, proper nouns, and acronyms not included in the common words file CROSSWD.TXT 113,809 Words included in the first edition of the Official Scrabble Players Dictionary: CRSWD-D.TXT 4,160 Additions to the Official Scrabble Players Dictionary in the second edition
The word source currently in use for international play, known as Collins Scrabble Words or CSW (formerly Official Scrabble Words or OSW) is not derived from a single dictionary, but combines three components: Collins (7th edition, 2005), Chambers (1998 edition) and TWL, the current Northern American wordlist.