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Top 12 Longest Words in The English Language

By HWA | Publish On: June 27, 2019 | Posted In:

English language has its origin in West Germanic language. It is named after Angles, a Germanic tribe. English is also termed as the most widely spoken language as it has been signed as an official language for about 67 countries. According to the 2nd edition of the 20 volume oxford English dictionary it has an entry of around 171,476 words in current use, 47,156  are obsolete words and 9,500 derivative words which are included as subentries.

English like any other language has wide range of words. It is undoubtedly rich and a very creative language and there are words which are tongue twisters, they are long containing too many characters and are also difficult to pronounce.

12 of The Longest Words in The English Language

longest word in english

Here is the example of some top 12 longest words in English language:

  •   Methionylglutaminylarginyltyros-ylglutamylserylleucylphen-ylalanylalanylglutaminylleucyllysylgl-utamylarginyllysylglutamylglycylalan-ylphenylalanylvalylprolyphenylalanY-lvalythreonylleucylglycylaspartylp-rolylglycylisoleucylglutamylglutam-inylsErylleucyllysylisoleucylasp-artylthreonylleucylIsoleucylglutam-ylalanylglycylalanylasparthlalanylleucy-lglutamylleucylglycylisoleucylprolylp-henylalanylseRylaspartylprolylleucylal-anylaspartylglycylpRolylthreOnylisoleuc-ylglutaminylasPfraginylalanylthreonyll-eucylarfinylalanylphenylalanylalanylal-anylglycylvalythreonylprolylalanylglut-aminylcysteinylphenylalanylglutamylm-ethionylleucylalanylleuOylisoleucylargi-nylglutaminyllysyhistidylprolylthreonylis-oleucylprolylisoleucylglycylleucylmethion-yltyrosylalanylasparaginylleucylvalylphen-ylalanylasparaginyllysyglycylisoleucylas-partylglutamylphenylalanylthrosylalanyl-glutaminylcsteinylglutamyllysylvalylgly-cylvalylaspartylserylvalylleucylvalylalnyl-aspartylvalylprolylvalylglUtaminylglutam-ylserylalanylprolylphenylalanylarginylgl-utaminylalanylalanylleucylarginylhistidylas-paraginyvalylalanylprolylisoleucylprolyliso-leucylphenylalanylisoleucylphenylalanylisol-eucylcysteinylprolylprolylaspartylalanylasp-rtylaspartylaspartylleucylleucylarginylgluta-minylisoleucylalanylseryltyrosylglycylarginy-lglycyltyrosylthreonyltyrOsylleucylleucylsery-larginylalanylglycylvalylthreonylglycylalanyl-glutamYlasparainylarginylalanylalanylleucyl-prolylleucylasparaginylhistidylleucylValylala-nyllysylleucyllysylglutamyltyrosylasparaginy-lalanylalanylprolylprolylleucylglutaminylglg-ycylphenylalanylglycylisoleucylserylalanylp-rolylaspartylglutaminylvalyllysylalanylalany-lisoleucylaspartylalanylglycylalanylalanylgly-cylalanylisoleucylserylglycylserylalanylisole-ucylvalyllysylisoIeucylisoleucylglutamylgluta-minylHistidylasparaginyliSoleucylglutamylpro-lylglutamyllysylmethionylleucylalanylalanylle-ucyllysylvalylphenylalanylcalylglutaminylproly-lmethionlysylalanylalanylthreonylarginylserine

This is counted as one of the longest words in the world in English language as it includes abbot 1900 characters within itself.  This is a Chemical name of – E. coli TrpA   this is a type of protein containing amino acid found in DNA strands and it has shortened form which is called as tintin. However, the longest ever English word known is of 189,819 letters which is termed as technical and has not been used in dictionaries as the fact that wither its a word is also disputed. 

  •  Lopadotemachoselachogaleokranioleipsanodrimhypotrim-

This is the longest ever word to have its origin in literature in the play of Aristophanes titled as “Assemblywomen”.  This word has around 182 characters which refer to spicy dishes that were cooked using the remains of beef and vegetables, it is also referred as a fictional dish mentioned in the comedy play which was written in 392BC.


This is a scientific name of a disease which has in total 45 characters. It refers to a kind of lungs disease which is often suffered by miners due to the inhalation of siliceous volcanic dust they inhale into their lungs. This is the longest word used in many English dictionaries.


This is a long 30 letter word to be coined in English dictionary which basically deals with thyroid disorders. This word was characterised by Fuller Albright in 1952 as pseudo- pseudohypoparathyroidism (with hyphen).


This word has in total 29 characters and has been described as the “longest unchallenged non-technical word”. This word basically refers to something which has little or no value or is termed as trifling.

  • Honorificabilitudinitatibus

This is basically a word which has 27 letters within it. If observer carefully it can be noticed that every vowel is followed by a consonant in this word. This also defined as the longest word ever used by Shakespeare in his works in the Act V, scene 1 of “Love’s labour’s lost”. The word refers to being invincible glorious.

  • Hepaticocholangiocholecystenterostomies 

It is termed as one of the longest words in the medical dictionary. It is basically described as a surgical term which relates to the creation of passage or way in between the hepatic duct and the gall bladder and between the gall bladder and the intestine to allow these organs to communicate.


This is a 42 character name given to soldier fly which has a life span of 6 to 8 days. This fly is native to Thailand and has never survived more than 8 days ever.

  • Antidisestablishmentarianism

This is referred to as the opposition to the disestablishment of the church referring to the 19th century movement in the political sphere of England  as the state church of England but in today’s scenario it might refer to any opposition to withdrawing government in support of a particular church or religion.

  • Radioimmunoelectrophoresis 

This is a 26 letter word where immunoelectrophoresis in which the substance separated or removed in the electrophoretic systems are said to be or identified as radioactive labels on antibodies.

  • Otorhinolaryngology

This basically deals with subspecialty in medicine dealing with eyes, nose and throat (ENT) and the related structure of forehead. The one who practises otorhinolaryngology are called as otorhinolaryngologist.

  • Spectrophotoflurometrically 

This is a 28 letter word  describing the use of spectrophotofluorometer, which is an instrument used to measure the quantity or amount of light produced out in a coloured band to trace  small components of a sample of blood , body tissue or any other substance.

However, it is very unlikely that these words are to be the part of everyday life daily conversation instead they’re mostly discovered as an answer to these search. Some other group of long words from English includes words like supercalifragilisticexpialidocious, incomprehensibilities etc.

Therefore, every now and then new words are being formed in English language and sometimes they might exceed the regular length of words and include too many characters within themselves. In English there are too many words alone and the language itself allows new words to be formed by coinage and construction, place names may also be considered as words. For example the longest officially known place name is – “Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu” which is a 57 letter name of a hill in New Zealand. Also studying and pronouncing these names have been pretty much troublesome as they are very much tongue twisting and long. Their spellings of course cannot be memorized in one single go. 

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