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  1. Longest word in English - Wikipedia

    The longest English word typable using only the top row of letters has 11 letters: rupturewort. The word teetertotter (used in North American English) is longer at 12 letters, although it is usually …

  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. 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 …

  4. Longest - definition of longest by The Free Dictionary

    Having the greater length of two or the greatest length of several: the long edge of the door. 2. Of relatively great duration: a long time. 3. Of a specified linear extent or duration: a mile long; an …

  5. The Longest Long Words List - Merriam-Webster

    Apr 28, 2025 · Most English words longer than about 15-20 letters are scientific, meaningless, or highly specialized, and they tend to be formed by affixation. This is the act or process of …

  6. 20 Longest Words in English (With Meanings, Pronunciation

    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.

  7. 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 …

  8. 10+ Longest Words In The World - Lingopie

    May 28, 2025 · In this post, we'll introduce you to the longest words in the world in some of the major foreign languages. After reading this, you'll definitely question why some languages …

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

    May 29, 2025 · The longest word in the Oxford English Dictionary is 45 letters: pneumonoultramicroscopicsilicovolcanoconiosis.

  10. 16 longest words in English with up to over 45 letters

    Feb 12, 2025 · Prepare to challenge your memory and discover the jaw-dropping lengths of the longest words in English.