Arguably the longest word in the English language (though it’s kind of cheating, because the names for diseases are so systematic in how they’re formed).
Still, at 45 letters, it’s recognized as the longest word in any major English dictionary.
It’s a medical term for a lung disease caused by breathing in particles of siliceous volcanic dust. It was originally created as a hoax, but has been adopted as a legitimate term because it closely resembles the characteristics of the condition and has been recognized in other major dictionaries.
If you allow chemical compounds, there’s a word that has 1,913 letters … but the madness must stop somewhere.
The Guiness Book of World Records recognizes the longest “real word” in the English language as “floccinaucinihilipilification,” which translates into “the act or habit of estimating or describing something as worthless, or making something to be worthless by said means.”
There’s a town in Wales … “Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch’ which was designed as a gimmick in the 19th century to attract tourists.
Also notable are … “Chargoggagogmanchauggagoggchaubunagungamaugg,” a lake in Webster, Massachusetts, and … “Taumatawhakatangihangakoauauotamateaturipukakapikimaungahoronukupokaiwhenuakitanatahu,” an 85-letter name for a hill in New Zealand.
Shakespeare coined honorificabilitudinitatibus in “Love’s Labour’s Lost” (which is considered English and not Latin because he used it).
A common citation as the longest word is Supercalifragilisticexpialidocious,” a 34-word song name from the popular movie “Mary Poppins.”
And here your grade school teacher had you reciting “Antidisestablishmentarianism” to make it look like she was sooo super-smart.