I would also add to read the definitions and indications aloud. This way as you break it up into chunks to memorize, your mind subconsciously fills in the blanks when you stumble through the definition. For the longer ones like roadway worker, break it up, don't try to memorize it in its entirety. It will seem impossible at first but the more you do it, the better and more accurate you'll be. If you study for 2-3 hours day, you should know it all a week or two before the test and at that point, it'll just be review.