Listen to and use academic vocabulary in context. This website offers an Academic Word List (AWL) divided into 10 sublists of word families with gap-fill exercises for each group.
Very good explanations with respective exercises.
Idioms, Phrasal Verbs, Slang, and Proverbs - with respective exercises.
Improve your vocabulary
Learn vocabulary with pictures and their sound. Choose a topic and listen to the pronunciation of the words. Additionally, you can check your knowledge with the listening quizz
Practice English synonyms with multiple choice exercises
Site for advanced learners; covers also recent words.