Okay... this is the first contest I've done so you have to be patient with me. (Please?)
I'm not changing the rules, just explaining them better.
The question was asked, can you use other forms of the words (such as plurals). The answer to that is yes.
Another member asked if you can use more than three words. The answer is yes, you can use as many of the words as you like, but you must choose at least three. You might want to put your three chosen words at the top of your entry since three of the words will be judged for their use in your piece.
The question was asked if you can use less than 200 words or more than 250. The answer is no. If your entry doesn't fall within that range, it will be disqualified.
Most of all, though... have fun with this! It is not supposed to be work.
And I forgot to say before --- good luck to you all!