Some more useful sites for teaching, learning and practising vocabulary
Puzzlemaker at Discovery education enables teachers to create puzzles,
You can create flashcards using Flashcard maker from Scholastic.com
Spelling wizard is also a great tool to help self study or enables teachers to create spelling scramble and word search
At SuperKidsVocabulary Builders, you can easily create puzzles, wordsearch or play games and learn new words.
Vocabulary.com is a great site to learn and teach vocabulary.
OneLook Dictionary enables you to access definitions from different dictionaries.
Flickr related tag browser is great. You type the word you want to search and see flickr images and related other words and images too.
ClassTools.net is a wonderful site to create flashcards, games, diagrams, puzzles.
Vocabulary and Spelling City is another great site to play with words.
Related post on this blog: Teaching Vocabulary-links, books, ideas