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The Official Tournament and Club Word List (2018 Edition) (OTCWL2018) is an update to the Official Tournament and Club Word List, and the official lexicon governing competitive play in the United States and Canada beginning February 1, 2019.

Where to Get It

For licensing reasons, this book is a members-only publication, available only through the NASPA Store.

Print Edition

No full print edition is currently available, but a printed list of new words will be available through our store, and will be included with purchases of OTCWL2016.

Electronic Editions

NASPA members may download both the full list of words, and the list of new words not found in OTCWL2016, through Member Services.

NASPA members may use the free word study and adjudication tool, NASPA Zyzzyva, to access a licensed electronic copy of this word list. OTCWL2018 will be included in the next edition of NASPA Zyzzyva, due to be released in January 2019.

NASPA Zyzzyva is available for download to Windows and Mac machines at the NASPA Zyzzyva download site, which includes download and installation instructions.

Developer Access

NASPA members who offer free software to our community are welcome to include OTCWL2018 in their products with appropriate credit and links.

Commercial developers are invited to contact us to discuss licensing terms.


None known so far.

Effective Date

The Advisory Board has determined that this edition will take effect on February 1, 2019.


As soon as OTCWL2016 went to press, the Dictionary Committee began reviewing the longer words that had been proposed for inclusion in that edition, but omitted due to time constraints.

This edition includes new words from three sources:

  • OSPD6
  • MWCD (online edition)
  • the Canadian Oxford Dictionary (2nd edition), primarily for words of up to 10 letters and their inflections and root forms.

86 previously acceptable words were nominated for review; 12 of them were removed when no evidence was found supporting their original addition.


This edition includes 3,385 new words: 2 two-letter words, 1 three-letter word, 4 four-letter words, 23 five-letter words, 49 six-letter words, 65 seven-letter words, 88 eight-letter words, 181 nine-letter words, 1263 ten-letter words, 840 eleven-letter words, 415 twelve-letter words, 200 thirteen-letter words, 147 fourteen-letter words, and 107 fifteen-letter words. Complete lists of new words and definitions can be found in Member Services.