Use the word checker to check your word exists without being exposed to cheats. Wurdit will look it up and let you know if your word is valid – links to dictionary entries are provided, for the curious.
This tool is equivalent to looking up a word in a dictionary when challenged in a game of Scrabble. Make sure you’re looking in the right list, there are two: TWL for tournament play in the US, Canada, and Thailand, and SOWPODS for the rest of the world. Simply visit the bottom of any page to check which list you’re using.