List of longest words in English


English is a language with many tongue twisters and exotic words. The adaptability and convenience of joining different words in English make it easier for linguists, language scholars and scientists to coin large words that boggle the tongue and body. Like rare coins, these words are treasured by language aficionados and are seldom used. Their structure itself makes it impossible for daily use. However, every alphabet contains at least five words whose characters exceed seven letters.

longest word
longest words in English:


This monstrous word contains 189,819 letters and is believed that the full name takes around three and a half hours to pronounce. It is the chemical name for 'titin', the largest protein discovered. The main reason for the length is that it consists of chemical names and jargons, which themselves contain a large number of letters. An example is in DNA studies where it can clock up to billions of letters for naming DNA strands. No wonder there is a shortage of DNA experts!

2. Pneumonoultramicroscopicsilicovolcanokoniosis

This gigantic word was first coined in 1935 by Everett M Smith. It stands for a lung disease that is caused by increased exposure to silica dust. Prominent around volcanic active areas, this ailment can often be fatal.

3. Hippopotomonstrosesquippedaliophobia

Guess the meaning? You can take a cue from the word 'phobia' at the end, which means fear. They literally mean fear of large words. People who are intimidated and run at the sight of large words are afflicted with this fear. They tend to show the classic signs of nervousness even for slightly larger words.

second longest word

Here are some interesting facts:

Longest words with non-repeating English letters:

1. Uncopyrightable: It means the subject matter is not good enough to be copyrighted.

2. Dermatoglyphics: It denotes the study of fingerprints and toe prints.

Longest Word with all vowels in order:

1. Pancreaticoduodenostomy: It means the artificial opening of the pancreas into the duodenum.

Longest Word in Which All Letters Appear Twice:

1. Esophagographers: They are medical personnel who conduct visual representation of the esophagus.

Other exotic long words:

1. Automysophobia: 
It means fear of getting dirty.

2. Boustrophedon: The ancient Greeks used it to code their letters. It means the practice of writing one line from left to right and the other from right to left.

3. Cholangiocholecystocholedochectomy: It is a medical process where the hepatic duct and gallbladder is surgically removed.

4. Keraunophobia: Do you fear thunder and lightning? Then you have Keraunophobia. It is also pronounced as Ceraunophobia.

5. Quinquagenarian: This word is used to describe people between the age of 50 and 59.

6. Transmogrification: Made popular by Harry Potter books, it has come to symbolize transformation into strange figures.

7. Xeroradiography: It is a type of an X-ray that prints the image on a paper instead of film.


The above interesting words will increase your knowledge about the exotic words in English. In order to be able to pronounce these words perfectly, you can improve your spoken English with the help of an online English trainer.

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