From Systems for Knowledge Discovery:
Dr. Word Master is an advanced vocabulary builder for GRE, SAT, TOEFL, and general vocabulary. With 3 different memorization strategies it will be easy and fun to improve your vocabulary. Dr. Word Master contains 8 different dictionaries. For example if you need to prepare for the GRE exam, start by learning words occurring on the GRE exam most frequently and if you want to make sure you perform optimally on the exam, memorize GRE master dictionary with over 5000 words.