Everything Translation

What is the Longest Word in English?

by William Reid

Have you ever wondered what the longest word in English is? We’ve been curious ourselves, but in all honesty, we can’t even prepare to read the most extended term of the English language. It’s the name of a protein found in the human body and has about 189819 letters. Imagine how someone would pronounce it. We definitely need Siri to do the drill, no? You can also visit YouTube and see a video pronouncing the word. However, we should warn you in advance, that it will take no less than three hours of your day.

Longest Word in English

English is the language of the artists and the creatives. It is rich, lively, and eloquent. All these kids spelling out tricky words of English in spelling bees makes it sound smooth, but it can sometimes be difficult for the non-natives and even the natives to speak tricky words.

The first time I heard, bruhaha, I thought someone just made it up to shut me up. Ever felt the same about certain stubborn tongue-twisting words? Isthmus, Anemon, Otorhinolaryngologist, and many other similar words may take up a lot of your energy and time but are sometimes fun to use.

We have made a list of some of the most popular longest words in English dictionaries that can be made easy if you start using them in conversations.

Let’s explore the top 14 longest words in English language

As technical or chemically active as they sound, most of the words from the longest word list have, ironically, exact and small definitions. Let us learn fifteen of the most creative long vocables of the world’s language.

1.     MethionylglutaminylarginyltyrosylglutamylserylleucylphenylalanylalanylglutaminylleucyllysylglutamylarginyllysylglutamylglycylalanylphenylalanylvalylprolyphenylalanYlvalythreonylleucylglycylaspartylprolylglycylisoleucylglutamylglutaminylsErylleucyllysylisoleucylaspartylthreonylleucylIsoleucylglutamylalanylglycylalanylasparthlalanylleucylglutamylleucylglycylisoleucylprolylphenylalanylseRylaspartylprolylleucylalanylaspartylglycylpRolylthreOnylisoleucylglutaminylasPfraginylalanylthreonleucylarfinylalanylphenylalanylalanylalanylglycylvalythreonylprolylalanylglutaminylcysteinylphenylalanylglutamylmethionylleucylalanylleuOylisoleucylarginylglutaminyllysyhistidylprolylthreonylisoleucylprolylisoleucylglycylleucylmethionyltyrosylalanylasparaginylleucylvalylphenylalanylasparaginyllysyglycylisoleucylaspartylglutamylphenylalanylthrosylalanylglutaminylcsteinylglutamyllysylvalylglycylvalylaspartylserylvalylleucylvalylalnylaspartylvalylprolylvalylglUtaminylglutamylserylalanylprolylphenylalanylarginylglutaminylalanylalanylleucylarginylhistidylasparaginyvalylalanylprolylisoleucylprolylisoleucylphenylalanylisoleucylphenylalanylisoleucylcysteinylprolylprolylaspartylalanylasprtylaspartylaspartylleucylleucylarginylglutaminylisoleucylalanylseryltyrosylglycylarginylglycyltyrosylthreonyltyrOsylleucylleucylserylarginylalanylglycylvalylthreonylglycylalanylglutamYlasparainylarginylalanylalanylleucylprolylleucylasparaginylhistidylleucylValylalanyllysylleucyllysylglutamyltyrosylasparaginylalanylalanylprolylprolylleucylglutaminylglgycylphenylalanylglycylisoleucylserylalanylprolylaspartylglutaminylvalyllysylalanylalanylisoleucylaspartylalanylglycylalanylalanylglycylalanylisoleucylserylglycylserylalanylisoleucylvalyllysylisoIeucylisoleucylglutamylglutaminylHistidylasparaginyliSoleucylglutamylprolylglutamyllysylmethionylleucylalanylalanylleucyllysylvalylphenylalanylcalylglutaminylprolylmethionlysylalanylalanylthreonylarginylserine

Whatever the name of this protein is, we can’t pronounce it without a bit of help from AI software. The short form of this word is connectin or titin. It is considered the longest word in English, with 1902 characters, according to the Guinness book of records 18th edition.

2.     Lopadotemachoselachogaleokranioleipsanodrimhypotrimmatosilphiparaomelitokatakechymenokichlepikossyphophattoperisteralektryonoptekephalliokiglopeleiolagoiosiraiobaphetraganopterygon

This term refers to a spicy food dish made with beef and vegetables. The name was given to a fictional dish mentioned by ancient green comic writer Aristophanes in a legendary comedy fiction called the Assemblywomen or Ecclesiazusae AROUND 392 BC.

3.     Floccinaucinihilipilification

Another term considered one of the longest word in English is floccinaucinihilipilification. The term is not scientific, which means little or no value of something, valueless or trifling. Ironically, the word is itself worthless, seldom used.

4.     Bababadalgharaghtakamminapronnkonnbronntonnepronntuonnthunntrovarrhounawnskawntoohoohoordeenenthurnuk

Describing the sound of a thunderclap that signaled the fall of Adam and Eve from heaven, this 101-alphabets long word was used in a novel by an Irish author in 1939.

5.     Aequeosalinocalcalinoceraceoaluminosocupreovitriolic

This term is specialized in British English and refers to spa waters in Bath, England. The word is made up of combining seven elements, with a total of 52 characters.

Aeque means being equal, salino is something that contains salt, calcalino refers to something that contains salt, ceraceo means waxy qualities, aluminoso means something that has aluminum, cupreo is used for copper, while vitriolic means to assemble something.

It’s water made of all these salts. It would be nice to take a hot water bath after pronouncing this.

6.     Antidisestablishmentarianism

This term is made of 28 letters and is used to describe any opposition to any principles set up by the ruling class. 

7.     Supercalifragilisticexpialidocious

This 34-character long word in English describes a situation when you have nothing to say. Remember Mary Poppins? She used it. This term is included in a few dictionaries.

8.     Honorificabilitudinitatibus

Want to say “Honorableness” in a lengthy fancy way? Use the 27-lettered long word honorificabilitudinitatibus.

9.      Osseocaynisanguineoviscericartilagininervomedullary

Thomas Love Peacock used this term in his first novel, published in 1816. The word is coined in Greek and Latin languages, describing body parts.


Would you buy a book that’s titled Antipericatametaanaparcircumvolutiorectumgustpoops? Francios Rabelais wrote a book in the 15th century about a giant and his son’s work.

11. Pneumonoultramicroscopicsilicovolcanoconiosis

This 45-charactered word is a medical term used to describe lung inflammation. It was used for miners that inhale silica dust from volcanoes.

12. Thyroparathyroidectomized 

If you know someone who doesn’t have both thyroid and parathyroid glands, you can refer to their condition with this 25-character long word of English.

13. Hippopotomonstrosesquippedaliohobia

This monstrous term is actually a vocable used to describe the fear of long words. How ironic is it to use a long phrase to explain the phobia of long words? Only adding to the terror, we are facing while reading it!

14. Spectrophotofluorometrically

The 28 characters that combine to form this term are as scared of it as you are. Believe it or not, it’s an adverb used to explain the measured amount of light using an instrument spectrophotoflurormeter. It’s a physics term—no need to use it outside the classroom.

15. Sesquipedalianism

The term sesquipedalianism describes the tendency to use long words in regular conversations. If you’re a sesquipedalian, you will start using these words ASAP!

Well, if not, you can always use but, if, and okay in a sentence, that’s pretty fun.


Many words can’t be called the longest words in English but are pretty tricky. For example, “Euouae” is the longest word made of only vowels. It’s a musical term. Similarly, the word “strength” is nearly made of all consonants, and it’s the longest monosyllabic word in English.

Most English’s longest words refer to chemistry or biology terminologies. Some of these words are rarely used, while others are available in the dictionary. The English literature is filled with rich and hard-to-pronounce words. Read the English version of Greek mythology, or try Shakespeare. It’s a wonder how literature enthusiasts remember all those dense vocables.

However, practice makes a man perfect. So if you want to impress a literature professor or are writing a piece of organic review, you can always learn some of the longest words in English and impress the audience.

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