- Oxford English Dictionary * The comprehensive resource!
- The American Heritage Dictionary of the English Language *
- Merriam-Webster's Third New International Dictionary, Unabridged *
- Historical Thesaurus of English
- Online Etymology Dictionary "This is a map of the wheel-ruts of modern English. Etymologies are not definitions; they're explanations of what our words meant and how they sounded 600 or 2,000 years ago."
- OneLook Dictionary Search Links to more than 200 general and specialized language and subject dictionaries.
- Rhymezone Rhyming Dictionary and Thesaurus Search for perfect rhymes, match ending sounds, get definitions or related words, check spelling, or find homophones, semantic siblings, or synonyms.
- Roget's Thesaurus (1911 edition) A classic dictionary of synonyms and antonyms.
- The Acronym Server Search for the meanings of abbreviations and acronyms, or find abbreviations and acronyms by typing in words. Includes a list of acronyms that have been searched for but not found.
- Abbreviations.com Search acronyms and abbreviation, or move from words in combination to their abbreviation. Browse by categories (e.g. government, computing, etc.).
- Merriam-Webster Online Search (Merriam Webster). Includes definitions, pronunciations, spelling, and a thesaurus.
- YourDictionary.com Links to collections of English and other-language dictionaries and thesauri.
- The Dictionary of American Regional English REF PE 2843 D52 1985 Updates.
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