Funk & Wagnalls is a comprehensive encyclopedia for students and adults.
Merriam-Webster Online DictionaryIncludes definition, pronunciation, audio pronunciation, part of speech, word endings (-ed,-ing), etymology and usage
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Encyclopedias from the Internet Public LibraryAnnotated list and links to free general encyclopedias
Search the headwords or full text of Roget's Thesaurus, 1911, version 1.02 (supplemented: July 1991) released to the public domain by MICRA, Inc. and the Gutenberg Project.
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