Vocabulary.com

Vocabulary.com is a dictionary for learning words, combining lookups with games and activities for learners browsing on their own or competing with participants worldwide through its VocabTrainer. Educators can assign ready-made word lists tied to thousands of books and topics and run a fast-paced Vocab Jam with students.

The site also runs the Vocabulary Bowl, tracking words mastered, jams played and questions answered, and offers learner subscriptions, vocabulary lists, a dictionary, test prep resources and teaching resources for schools and districts, alongside leaderboards showing today's, weekly and monthly leaders and a page of commonly confused words.