Here is an interesting link which helps those who want to learn some new words or those who want to test their vocabulary or else those who want to know the real meaning of the words they are using... you might say we know number of sites of this kind.. but the difference here is you are not only helping yourself, also the needy people in Africa. For each word you choose correctly the UNW Food Program people will donate 20 grains of rice to them. The words will come in an order which is pretty much similar to GRE pattern. If you got a word right the next one is harder... or else you will get a word which makes you feel embarrassing to answer ... but keep in mind that is your actual level :)... Come on start now... I'm sure you will gain lots of words and can donate a lot without spending a single buck.