Scrabble is a word game

Word game

Word games and puzzles are spoken or board games often designed to test ability with language or to explore its properties.Word games are generally engaged as a source of entertainment, but have been found to serve an educational purpose as well...

 in which two to four players score points by forming words from individual lettered tiles on a game board marked with a 15-by-15 grid. The words are formed across and down in crossword

Crossword

A crossword is a word puzzle that normally takes the form of a square or rectangular grid of white and shaded squares. The goal is to fill the white squares with letters, forming words or phrases, by solving clues which lead to the answers. In languages that are written left-to-right, the answer...

 fashion and must appear in a standard dictionary

Dictionary

A dictionary is a collection of words in one or more specific languages, often listed alphabetically, with usage information, definitions, etymologies, phonetics, pronunciations, and other information; or a book of words in one language with their equivalents in another, also known as a lexicon...

. Official reference works (e.g. The Official Scrabble Players Dictionary

Official Scrabble Players Dictionary

The Official Scrabble Players Dictionary or OSPD is a dictionary developed for use in the game Scrabble, by speakers of American and Canadian English.-Creation:...

) provide a list of permissible words. The Collins

HarperCollins

HarperCollins is a publishing company owned by News Corporation. It is the combination of the publishers William Collins, Sons and Co Ltd, a British company, and Harper & Row, an American company, itself the result of an earlier merger of Harper & Brothers and Row, Peterson & Company. The worldwide...

 Scrabble checker can also be used to check if a word is allowed.

The name Scrabble is a trademark of Hasbro, Inc.

Hasbro

Hasbro is a multinational toy and boardgame company from the United States of America. It is one of the largest toy makers in the world. The corporate headquarters is located in Pawtucket, Rhode Island, United States...

 in the United States and Canada.