I know a lot of people on my flist are proud of their vocabulary. Well, here's a test for you, and at the same time you can earn grains of rice as contributions to the UN World Food Programme. For every word whose meaning you guess correctly, you'll earn 20 grains of rice towards the UN programme. 100 grains is a bowl.
It's all completely free; the rice is paid for by the advertisers whose commercials appear at the bottom of the screen, as is explained in the FAQ.
Challenge your vocabulary and feed the hungry Keep an eye on your vocabulary level, too. Each time you get a word wrong, your current level drops and you'll get an easier word. Each time you get a word right, you'll get a harder word, and every few correct words your level will increase. My highest level is 49 51.