10 Longest Words in the English Language (2023)

Written by Henry Mcdowell, follow him on Twitter.

There are slightly less than 171,5 thousand words in English language according to the newest Oxford English dictionary. The length of words varies. All of us know short words, but not many know what are the 10 longest words in the English language. Perhaps you didn't even know about their existence, but after you read this article, you will be ready to impress people.

Our List of 10 Longest English Words

10. Incomprehensibilities

Perhaps you already know this term. As an aperitif to more complicated ones, this word is even pronounceable, so if you are interested, watch thematic Youtube videos or use Google voice services. This rather impressive 21-letter word is not hard to understand, as it means something impossible to comprehend. Ask your friends about their incomprehensibilities and have fun. If they find it hard to translate, guide them through the top translation companies that always get it right. A not long time ago, in the 90s, the incomprehensible word set the record as the longest one. However, it won only in the category of the longest words “in common usage.”

9. Dichlorodifluoromethane

The longest word in English language refers to sciences such as chemistry or medicine because these spheres of knowledge operate complicated nouns that are coined from several words to describe one phenomenon. Dichlorodifluoromethane, a 23-letter-long term, is one of such words, as it is a chemistry term which means a chlorofluoromethane CF2Cl2. This is a colorless gas that is widely known under the name Freon-12, which you may have heard before. This gas is a refrigerant and aerosol spray propellant that is used for medical purposes.

Read also: Reviews of the best SDS translation services to help you with the decision.

8. Honorificabilitudinitatibus

Interestingly, this 27-letter word came to us from English literature. We owe Shakespeare not only world-known plays and sonnets but also this splendid word. This word is Latin and means the state when the person can achieve honors. It is mentioned in Scene I of Love’s Labour’s Lost by a character Costard. This word also set a record as one of the long English words which feature only alternating consonants and vowels. However, it may be that Shakespeare borrowed this word from medieval manuscripts because it was widely used by scholars and grammarians circa. 1055.

7. Antidisestablishmentarianism

This word is only one letter more than the previous one on the list. However, its meaning differs greatly and signifies a political movement of past centuries. It originated in 19th century Britain which wanted to separate state and church. At the time, the term meant a certain political movement that aimed to disestablish the Church of England as the official state church of Wales, Ireland, and England. So, people who belonged to this movement, thought that the Church is an integral part of the state which needs patronage and protection from the government. This is one of the longest English words of non-scientific origin, although it is absent from some dictionaries.

6. Floccinaucinihilipilification

With its impressive 29 letters, this word is the longest non-technical word in the English language. Although not all dictionaries recognize it, the word flourishes. It signifies the habit when the person describes or treats something as not important, worthless, or without value. Notably, it contains a bunch of Latin words that mean “nothing,” so perhaps, it is used mostly in humorous ways. The first usages are dated back to 1741, but it is also used nowadays. For example, it was used in Parliament on 21st February 2012 by a Conservative Jacob Rees-Mogg.

5. Supercalifragilisticexpialidocious

Originally, this is the name of a song from the musical Mary Poppins released by Disney in 1964. By this word, Mary Poppins tried to describe her feelings after she won a horse race. If we decode this word and analyze its components, it will mean something like “atoning for educability through delicate beauty,” as one of the academics said. Or, in other words, it is about everything great, glorious, grand, superb, wonderful, and splendid. Later, people even used this term for other songs. If you are interested in the translation of this word to other languages, read our pick of French document translation to find out what are the 10 longest words in this language.

4. Hippopotomonstrosesquippedaliophobia

If you are reading this article, then perhaps, you don’t have hippopotomonstrosesquippedaliophobia. You will never guess, but this word means the fear of long words! The 36-letter word is not recognized by the American Psychiatric Association. However, it falls into a definition of social phobia. When the person sees long words, they feel fear and anxiety which sometimes leads to panic. A person with this phobia can experience sweating, dizziness, trembling, headache, trouble breathing, and even avoiding reading because of the fear.

3. Bababadalgharaghtakamminapronnkonnbronntonnepronntuonnthunntrovarrhounawnskawntoohoohoordeenenthurnuk

If this is only #3, then what is the longest word in the world?! This 101-letter term was coined by James Joyce, an author best known for his Ulysses. The Irish author used the term in the novel Finnegan’s Wake. In fact, the word aims to represent the sound of thunderclap which happened after Eve and Adam fell from Heaven. James Joyce is known for his many literary experiments such as the “stream of consciousness” a technique in which he directly “translated” subconscious thoughts of heroes into the text of the novel. It’s no wonder that he created such a breathtaking word which indeed sounds like a long sound which goes after a strike of a thunderbolt.

Useful information: read our reviews of USCIS certified translation services

2. Lopado­temacho­selacho­galeo­kranio­leipsano­drim­hypo­trimmato­silphio­parao­melito­katakechy­meno­kichl­epi­kossypho­phatto­perister­alektryon­opte­kephallio­kigklo­peleio­lagoio­siraio­baphe­tragano­pterygon

This word is even longer than the previous, as it consists of 210 symbols. It is the second-longest word in English language. Many words on our list originate from literature, and this one is not an exception. It was firstly used by Aristophane to describe a fictional dish that consists of fowl, flesh, fish, all kinds of dainties, and sauces. If you want to know more about many kinds of translation, read about English to Chinese translation services for more interesting facts. As for Aristophanes's word, the creator carefully describes all dish components. Namely, it consisted of new wine boiled down, rooster, hare, wood pigeon, honey, crab or shrimp, giant fennel, fish slices, and even a small shark’s head. According to Guinness World Records, this is the longest word ever used in literature.

1. Methionyl​threonyl​threonyl​glutaminyl​alanyl​prolyl​threonyl​phenyl​alanyl​threonyl​glutaminyl​prolyl​leucyl​glutaminyl​seryl​valyl​valyl​valyl​leucyl​glutamyl​glycyl​seryl​threonyl​alanyl​threonyl​phenyl​alanyl​glutamyl​alanyl​histidyl​isoleucyl​seryl​glycyl​phenyl​alanyl​prolyl​valyl​prolyl​glutamyl​valyl​seryl​tryptophyl​phenyl​alanyl​arginyl​aspartyl​glycyl​glutaminyl​valyl​isoleucyl​seryl​threonyl​seryl​threonyl​leucyl​prolyl​glycyl​valyl​glutaminyl​isoleucyl​seryl​phenyl​alanyl​seryl​aspartyl​glycyl​arginyl​alanyl​lysyl​leucyl​threonyl​isoleucyl​prolyl​alanyl​valyl​threonyl​lysyl​alanyl​asparaginyl​seryl​glycyl​arginyl​tyrosyl​seryl​leucyl​lysyl​alanyl​threonyl​asparaginyl​glycyl​seryl​glycyl​glutaminyl​alanyl​threonyl​seryl​threonyl​alanyl​glutamyl​leucyl​leucyl​valyl​lysyl​alanyl​glutamyl​threonyl​alanyl​prolyl​prolyl​asparaginyl​phenyl​alanyl​valyl​glutaminyl​arginyl​leucyl​glutaminyl​seryl​methionyl​threonyl​valyl​arginyl​glutaminyl​glycyl​seryl​glutaminyl​valyl​arginyl​leucyl​glutaminyl​valyl​arginyl​valyl​threonyl​glycyl​isoleucyl​prolyl​asparaginyl​prolyl​valyl​valyl​lysyl​phenyl​alanyl​tyrosyl​arginyl​aspartyl​glycyl​alanyl​glutamyl​isoleucyl​glutaminyl​seryl​seryl​leucyl​aspartyl​phenyl​alanyl​glutaminyl​isoleucyl​seryl​glutaminyl​glutamyl​glycyl​aspartyl​leucyl​tyrosyl​seryl​leucyl​leucyl​isoleucyl​alanyl​glutamyl​alanyl​tyrosyl​prolyl​glutamyl​aspartyl​seryl​glycyl​threonyl​tyrosyl​seryl​valyl​asparaginyl​alanyl​threonyl​asparaginyl​seryl​valyl​glycyl​arginyl​alanyl​threonyl​seryl​threonyl​alanyl​glutamyl​leucyl​leucyl​valyl​glutaminyl​glycyl​glutamyl​glutamyl​glutamyl​valyl​prolyl​alanyl​lysyl​lysyl​threonyl​lysyl​threonyl​isoleucyl​valyl​seryl​threonyl​alanyl​glutaminyl​isoleucyl​seryl​glutamyl​seryl​arginyl​glutaminyl​threonyl​arginyl​isoleucyl​glutamyl​lysyl​lysyl​isoleucyl​glutamyl​alanyl​histidyl​phenyl​alanyl​aspartyl​alanyl​arginyl​seryl​isoleucyl​alanyl​threonyl​valyl​glutamyl​methionyl​valyl​isoleucyl​aspartyl​glycyl​alanyl​alanyl​glycyl​glutaminyl​glutaminyl​leucyl​prolyl​histidyl​lysyl​threonyl​prolyl​prolyl​arginyl​isoleucyl​prolyl​prol...isoleucin

This is the longest word in the English language with its impressive 189,819 symbols. Like many long words, this one comes from chemistry and signifies a protein structure. In fact, this is the largest known protein in nature! That is why its name consists of so many different chemical matters. This technical name is never pronounced and is rather used to give a full scientific name for a substance. This protein is commonly known as titin, or methionyl...isoleucin, but if you try to pronounce its full name, it may take you three and a half hours to spell it.

See also: How to choose the best English to Czech translation service online.

Are You Surprised with Top Biggest English Words?

We believe that long words exist in the English language for a reason. Sometimes, they are made up words by ancient and modern authors who created new words just for fun. They often serve humorous or expressive purposes. Other terms have a medical origin, for example, the longest English word for phobia. Many of them came from chemistry, and the largest known word means a certain type of protein. TheWordPoint faces similar words quite often when we provide specialized industry documents, like medical, scientific, or technical translation service for specific needs. But mostly, the words have far fewer letters than the ones in this list.

10 Longest Words in the English Language (1)


What is the 52 letter word? ›

Aequeosalinocalcalinoceraceoaluminosocupreovitriolic (52 letters) In the 17th century, Dr. Edward Strother coined the 52-letter word aequeosalinocalcalinoceraceoaluminosocupreovitriolic. The word is used to describe the spa waters in Bath, England.

What is the 190 000 letter word? ›

1. methionylthreonylthreonylglutaminylalanyl…isoleucine. You'll notice there's an ellipsis here, and that's because this word, in total, is 189,819 letters long, and it's the chemical name for the largest known protein, titin.

What is the longest word in the English language riddle answer? ›

pneumonoultramicroscopicsilicovolcanoconiosis is the longest word that appears in the Oxford Dictionary of English, defined as 'an artificial long word said to mean a lung disease caused by inhaling very fine ash and sand dust'.

Is supercalifragilisticexpialidocious the longest word in English? ›

At 34 letters long, “supercalifragilisticexpialidocious” is not even the longest word in the Dictionary. That honor is bestowed upon a 45-letter medical term that we will not even dare try to pronounce (you can take a crack at it, though): “Pneumonoultramicroscopicsilicovolcanoconiosis”.

What is the 180 000 letter word? ›

methionylthreonylthreonylglutaminylarginyl… 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 say!

Which word has 189 819 letters? ›

The longest word in the world is the English term: "methionylthreonylthreonyl(...) isoleucine". This term, which has no less than 189, 819 letters, is the chemical name of the largest protein: titin.

What word has 183 letters? ›

Longest word in English
4 more rows

What is a 200k letter word? ›

The world's longest scientific word

As we saw at the start of our hunt, the longest word according to a lot of sources is the technical name for the protein titin. It is the same across all languages and has nearly 200,000 letters. Here's a snippet of the first 4,000 characters!

What word has 1 million letters? ›

"Post Office" starts with 'P', ends with 'E' and has a million letters in it.

How many words is 100000 letters? ›

Answer: 100,000 characters is between 14285 words and 25000 words with spaces included in the character count. If spaces are not included in the character count, then 100,000 characters is between 16666 words and 33334 words.

What is at the end of a rainbow? ›

12 Answers

The letter "W". That's an easy one. have you ever noticed that a W upside down looks like a double rainbow?

What is the longest word that takes 3 and 1 2 hours to pronounce? ›

A word of warning… the “word” takes about 3.5 hours to say. The word is 189,819 letters long. It's actually the name of a giant protein called Titin. Proteins are usually named by mashing-up the names of the chemicals making them.

What has 189,819 letters and takes 3 hours to pronounce? ›

The longest word in English has 189,819 letters and takes 3 hours to pronounce. This is a technical term for the chemical composition of titin.

Is Supercalifragilisticexpialidocious a real word? ›

The word supercalifragilisticexpialidocious. is not the longest word in the dictionary. It is a word that was made up in 1964, in a movie called 'Mary Poppins'. It is just a mouthful of nonsense, but people found it rather funny to say.

What is the 45 letter word in English? ›

The longest word entered in most standard English dictionaries is Pneumonoultramicroscopicsilicovolcanoconiosis with 45 letters. Our definition is "a lung disease caused by inhalation of very fine silicate or quartz dust." The entry for this word can be found in our Medical Dictionary.

What is a 29 letter word in English? ›

Floccinaucinihilipilification. The word floccinaucinihilipilification is made up of 29 letters.


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