A Word A Day - Today's Word: Audio clip, definition, and example usage.
Commonly Misspelled Words in English: Select a reference source and click on any word in a list to get a definition, pronunciation or translation of that word to your language. Take a quiz on spelling.
Daily Vocabulary Test: A new short three question multiple choice quiz every day to test your vocabulary knowledge.
Dave's Choice Words: Dave's Choice Words are fun, free vocabulary building exercises.
English Words from Chinese: English words which have come into the language from Chinese.
Exploring Words: Another advanced English-vocabulary program for long-distance learners of all ages, everywhere.
Grandiloquent Dictionary: A collection of 2000 words which are often omitted from dictionaries, and are in danger of being eliminated from the English language.
Heenan's Universal Dictionary: A collection of weird and wonderful words and their alternate meanings; sources, too, where available.
International House of Logorrhea: A online dictionary of obscure and unusual words and obsolete terms to help enhance vocabulary; over 15,500 English words with brief definitions.
MT Desk: Word lists by medical speciality including Alternative Medicine, Cardiovascular, Dermatology/Skin, and other areas of care.
The Phrontistery: A site for lovers of obscure and unusual words, featuring a dictionary of rare words, word lists of vocabulary on specific topics, essays and discussions on etymology, vocabulary and language usage.
Vocab Vitamins: Introduces an uncommon word or phrase each day, along with a definition. Includes archives, and a daily email service.
Vocabulary Activities for Standardized Tests: Interactive activities on word lists based on themes.
VocabularyMail.com: A free daily email broadcast of one to three words, their definitions, and explanations and examples of how to use them effectively in your speech and writing.
Vokabeln.net: Web-based vocabulary trainer with a multilanguage interface. Features shortcuts for special characters used in ~100 languages.
WordGenie: An electronic vocabulary enhancement system that runs as a screen saver on your PC computer.