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  1. Longest word in English - Wikipedia

    The longest word in any of the major English language dictionaries is pneumonoultramicroscopicsilicovolcanoconiosis (45 letters), a word that refers to a lung …

  2. What's The Longest English Word? A List Of 15 Lengthy Words ...

    Apr 11, 2023 · At over 180,000 letters long, the chemical name of the protein titin is often said to technically be the longest English word. If spoken out loud, this word takes over three hours to …

  3. 13 of the Longest Words in the English Language - ThoughtCo

    May 11, 2025 · This list of the longest words in the English language could score you major points on your next game — if you can remember how to spell them. Some of the words that qualify …

  4. 150 Longest Long Words in English (+ Definitions) - Writing …

    This is the ultimate list of the 150 longest long words in the English language. If you’re here, you either have an undying love for polysyllabic monstrosities or you’ve simply lost a bet and now …

  5. 12 of the Longest Words in the World, By Category - Mental Floss

    Here are some examples of the longest words by category. 1. Methionylthreonylthreonyglutaminylarginyl ... isoleucine. Note the ellipses. All told, the full …

  6. 14 of the Longest Words in English | Grammarly Blog

    Jun 21, 2023 · What is the longest word in English? The longest English word is pneumonoultramicroscopicsilicovolcanoconiosis, which is forty-five letters long and refers to a …

  7. Full ‘Titin’ Protein Name is 189,819 Letter ‘Longest’ English Word

    Dec 7, 2021 · It’s a matter of debate. According to the Oxford English Dictionary, the 45 letter ‘pneumonoultramicroscopicsilicovolcanoconiosis’ is the longest English word. Maybe it’s …

  8. The 20 Longest Words in English and Their Meanings - Parade

    Jun 22, 2024 · What's the longest word in English? We have the longest single word and a list of 20 English words with the most letters. Plus, what they mean and how to say them.

  9. What Is the Longest Word in English? - Reader's Digest

    May 29, 2025 · There are about a million words in the English language, but do you know the longest word in English? You may think it’s antidisestablishmentarianism, at 28 letters long.

  10. Discover What Is the Longest Word in the World - Rosetta Stone

    Apr 21, 2025 · According to the Guinness World Records, the longest word in the world is a 195-character Sanskrit word from the 15th-century work titled Varadambika Parinaya. The entire …