I could go on, but this is already a pretty long post. All in all, a good place to live, but I for one am looking elsewhere.
PneumonoÂ­ultraÂ­microscopicÂ­silicoÂ­volcanoÂ­coniosis succeeded electrophotomicrographically as the longest word in the English language recognized by the National Puzzlers' League at the opening session of the organization's 103rd semi-annual meeting held yesterday at the Hotel New Yorker.
(29 letters; an estimation of something as worthless) is the longest word in the first edition of the Oxford English Dictionary. The OED2 shows a use of this word in a 1741 letter by William Shenstone (1714-1763), a British poet and essayist.