The Scholastic Network has had their Word Wizard for awhile. That allowed students to click on any word on The Scholastic Network and get a definition for the word. Now Scholastic Network has gone one step further with the Vocabulary Quiz Maker.
I read about this great tool on Free Technology For Teachers.
All you have to do is provide a title for your word list. Then you list all of the words that you would want your students to define. Click on "Next Step" and each word is defined with one definition or if their are several to choose from, you will have the opportunity to choose from the several options to be used as the definition. Make all of your choices and one click and you are presented with a vocabulary worksheet to print.
There are other vocabulary quiz makers that I have written about in the past that provide interactive online quizzes, but sometimes the "paper or pencil" worksheet will serve your purpose just fine.