The Scrabble Challenge uses the OWL3, aka OTCWL2014 dictionary. This is the official dictionary for tournament play in the US and Canada. It is available for ordering to NASPA (North American Scrabble Players Association) members through their website.

The OWL3 is based on the Official Scrabble Players Dictionary (OSPD) which can be bought in stores, but there are a few differences:

• OWL3 contains offensive words which were expurgated from the "family-edition" OSPD.
• OWL3 contains longer words (up to 15 letters.)
• OWL3 has a number of words that were accidentally ommitted from the OSPD.

Please note: A separate dictionary, Collins Scrabble Words (CSW), is used for European tournament play. There are a number of differences between CSW and the North American dictionary. On the Scrabble Challenge, CSW-only words like "ch" will not play.

For more information on the various dictionaries, read the Scrabble FAQ.

Site Updated: 2023/Oct/6
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