At the Mark Twain Birthplace State Historic Site, we have a Mark Twain Lexicon, published by the University of Missouri Studies, in 1938 that lists approximately 8,000 words attributed to him through the use of Americanisms, new words he coined, and archaisms. John Huffman Historic Site Administrator Mark Twain Birthplace SHS Union Covered Bridge SHS (573)565-3449 Fax- (573)565-3718 [log in to unmask]