Question: is supercalifragilisticexpialidocious the longest word in the dictionary?
Answer: 5 What's the longest word you know? If you watched Mary Poppins as a child, you might quickly think of supercalifragilisticexpialidocious (thirty-four letters). ... It is also one of the longest monosyllabic words of the English language. 8 Euouae is six letters long, but all of the letters are vowels.