Many websites offer vocabulary word lists, including vocabulary.com, iteslj.org and bigiqkids.com. Some websites, such as vocabulary.com, offer word lists for a variety of purposes, such as test prep, tributes to famous people, and words found in historical documents. Other sites provide vocabulary for a specific purpose.
The other two websites focus on vocabulary for learning English as a Second Language, with lists for each school grade level, respectively. High school students preparing for the SAT can find word lists at majortests.com. Theme-based vocabulary lists are available at enchantedlearning.com. Some lists only provide the vocabulary words, while others also give the definitions.