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Official Description

Featuring advanced algorithms, unparalleled anagram performance, sophisticated spell-checks and fast wild-card searches.

Including 13 complete and unabridged editions of word-lists:
First & Second Editions OSPD3 OSPD4 OSWi OWL1-LWL OWL2-LWL SOWPODS TWLO TWL06 CSW ODS4 ODS5

If it's in the dictionary, it’s in WordList10!