PneumonoultramicroscopicsilicovolcanoconiosisThe LONGEST WORDS in OXFORD Dictionaries are:antidisestablishmentarianism - opposition to the disestablishment of the Church of England - 28 lettersfloccinaucinihilipilification - the estimation of something as worthless - 29 letterspneumonoultramicroscopicsilicovolcanoconiosis- a supposed lung DISEASE - 45 letters
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