I just recently found this website. It seems legitimate, but you never know these days. What you do is you go to this website called Free Rice and they give you a word and you have to choose the correct synonym. Every time you get one right they donate 10 grains of rice. They monitor your vocabulary level and how much rice you have accumulated. I think it is pretty cool because you get to improve your vocabulary and help people at the same time. Check it out!