FreeRice.com Tests Your Vocabulary

A sister site to Poverty.com, FreeRice.com offers an adaptive vocabulary quiz and donates 10 grains of rice through the United Nations for each correct answer. The site's goal is to help end world hunger. Advertisers include Toshiba, Apple, iTunes, Radisson Hotels & Resorts, American Express, Macy's, Fujitsu. Ads rotate below each vocabulary screen where site visitors are asked to pick the word that matches the vocabulary term, such as alveolate (which means honeycombed); prestidigitator (magician); and adjuration (appeal).