Here are my top 10 dictionary and word sources: 1. The American Heritage Dictionary - Comprehensive and widely respected dictionary of American English. 2. Oxford English Dictionary - Considered the definitive record of the English language. 3. Merriam-Webster's Collegiate Dictionary - Another top general dictionary for American English. 4. Dictionary of American Regional English - Excellent for understanding regional vocabulary variations. 5. Roget's International Thesaurus - Indispensable for finding synonyms and related words. 6. Bartlett's Familiar Quotations - Source for locating famous quotations and their origins. 7. Macmillan Dictionary for Children - Useful dictionary designed specifically for young learn