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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. 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 …

  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. LONGEST Definition & Meaning - Merriam-Webster

    Adjective The bridge is the longest in the world. We drove a long distance. the long side of the building The whale was 50 feet long. “How long was the race?” “The race was five miles long.” …

  6. 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 …

  7. 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 …

  8. 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 …

  9. Longest - Definition, Meaning & Synonyms | Vocabulary.com

    4 days ago · DISCLAIMER: These example sentences appear in various news sources and books to reflect the usage of the word ‘longest'. Views expressed in the examples do not represent …

  10. 73 Synonyms & Antonyms for LONGEST - Thesaurus.com

    Find 73 different ways to say LONGEST, along with antonyms, related words, and example sentences at Thesaurus.com.

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