MT Desk - Word lists by medical speciality including Alternative Medicine, Cardiovascular, Dermatology/Skin, and other areas of care.

X-empt's Online Dictionary - Use this dictionary to look up a list of words all at once.

Grandiloquent Dictionary - A collection of 2000 words which are often omitted from dictionaries, and are in danger of being eliminated from the English language.

MyWordaDay - Expand your vocabulary with this free service teaches new words and restores the ones that slipped away.

English Words from Chinese - English words which have come into the language from Chinese.

Shoecabbages - A listing of words which have different meanings in other languages.

WordGenie - An electronic vocabulary enhancement system that runs as a screen saver on your PC computer.

Daily Vocabulary Test - A new short three question multiple choice quiz every day to test your vocabulary knowledge.

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.

The Spizzerinctum Page - Obscure words in a quiz format that includes .wav files of pronunciations.

Finktoaster - A collaborative dictionary. Add your own words and definitions.

Dillon's Online Vocabulary - Vocabulary tests are designed to increase one's vocabulary through interactive quizzes

International House of Logorrhea - A vocabulary-enhancing dictionary of obscure, rare and unusual words; over 11000 words listed with brief (one-line) definitions for quick and easy reference.

Phobia Word List - Over 300 Phobia words listed and defined.

Heenan's Universal Dictionary - A collection of weird and wonderful words and their alternate meanings; sources, too, where available.

Forthright's 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.