Valid Scrabble words and the rules of playability
https://fun-wiki.win/index.php/Valid_Scrabble_words_and_the_rules_of_playability
Valid Scrabble words come exclusively from the official dictionary, and playability hinges on whether they connect properly on the board. You can use two-letter gems like 'qi' or 'za' but cannot make up names or abbreviations; every word must be spelled correctly and placed to form valid crosswords in each direction.