allwords.com - English dictionary with multi-lingual search capability.
American Heritage Dictionary of the English Language - Third Edition
Cambridge International Dictionaries - search separate dictionaries of English, phrasal verbs, or idioms.
DICT Development Group - simultaneously search several dictionaries using freely available client/server software.
Dictionary.com - guide to dictionaries and reference materials on the internet.
Dictionary of American Regional English - specializes in regional words and phrases.
Encarta World English Dictionary - features audio clips of words pronounced.
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Lexical FreeNet - this program allows you to search for rhymes and relationships between words and concepts that might never have occurred to you.
Information Please - from the print reference database, offering millions of useful and interesting facts on a wide range of topics online. Also includes a dictionary and encyclopedia.
Merriam-Webster Dictionary - online version of this popular dictionary.
Online Rhyming Dictionary - retrieve a list of words that rhyme with a given input word.
Vocabulary of Alliteration - a dictionary of alliterative words, for use in writing poems, songs, and studying phonetic and phonemic syllable divisions in English.
Webster's Revised Unabridged Dictionary, 1913 Edition - an older dictionary, but with all the common words and a rich source of definitions of obsolete words.
Wordsmyth Educational Dictionary-Thesaurus - American English dictionary with an integrated thesaurus and other lexical resources.
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