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Long English Words

Explore 55 fascinating long English words with complete meanings, pronunciation, etymology stories, and usage examples.

llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch

58 lettersgeneralextreme

A large village on the island of Anglesey in Wales. Its name is the longest in Europe and one of the longest place names in the world.

/ˌlænˌvaɪrˌpʊlˌɡwɪnˌɡɪlˌɡoʊˌɡɛrɪˌkʰwɪrnˌdrɒbʊlˌɬænˌtɪˌsɪlɪˌoʊˌɡoʊˌɡoʊˌɡɒx/

pneumonoultramicroscopicsilicovolcanoconiosis

45 lettersmedicalextreme

A lung disease caused by inhaling very fine ash and sand dust, especially from volcanoes.

/ˌnuːmənoʊˌʌltrəˌmaɪkrəˌskɑːpɪkˌsɪlɪkoʊvɒlˌkeɪnoʊkoʊniˈoʊsɪs/

hippopotomonstrosesquippedaliophobia

36 lettersfunhard

The fear of long words. Ironically, the word itself is very long.

/hɪˌpɑːpətoʊˌmɑːnstrəˌsɛskwɪpəˈdeɪliəfoʊbiə/

supercalifragilisticexpialidocious

34 lettersliterarymedium

Extraordinarily good; wonderful. Popularized by the 1964 Disney film Mary Poppins.

/ˌsuːpərˌkælɪˌfrædʒəlɪˌstɪksˌɛkspiˌælɪˈdoʊʃəs/

pseudopseudohypoparathyroidism

30 lettersmedicalextreme

A hereditary condition that mimics hypoparathyroidism but does not involve low parathyroid hormone levels.

/ˌsuːdoʊˌsuːdoʊˌhaɪpəˌpærəˌθaɪrɔɪdɪzəm/

floccinaucinihilipilification

29 lettersgeneralhard

The action or habit of estimating something as worthless.

/flɒksɪˌnɔːsɪˌnaɪhɪlɪˌpɪlɪfɪˈkeɪʃən/

antidisestablishmentarianist

29 letterspoliticalextreme

A person who opposes the withdrawal of state support from an established church.

/ˌæntɪdɪsɪˌstæblɪʃmənˈtɛəriənɪst/

hexakosioihexekontahexaphobia

29 lettersfunhard

Fear of the number 666, considered the "number of the beast" in the Book of Revelation.

/ˌhɛksəˌkoʊsioʊˌhɛksəˈkɒntəˌhɛksəˈfoʊbiə/

antidisestablishmentarianism

28 letterspoliticalhard

Opposition to the withdrawal of state support from an established church, especially the Church of England.

/ˌæntɪdɪsɪˌstæblɪʃmənˈtɛəriənɪzəm/

spectrophotofluorometrically

28 lettersscientificextreme

In a way that relates to the measurement of fluorescent light using a spectrophotometer.

/ˌspɛktrəˌfoʊtoʊˌflʊərəˈmɛtrɪkli/

honorificabilitudinitatibus

27 lettersliteraryhard

The state of being able to achieve honors. The longest word in Shakespeare's works.

/hɒˌnɒrɪfɪkəˌbɪlɪˌtjuːdɪnɪˈteɪtɪbəs/

psychoneuroendocrinological

27 lettersscientificextreme

Relating to the study of interactions between the nervous system, endocrine system, and psychology.

/ˌsaɪkoʊˌnʊəroʊˌɛndoʊˌkrɪnəˈlɑːdʒɪkəl/

electroencephalographically

27 lettersmedicalextreme

In a manner relating to the recording of electrical activity in the brain.

/ɪˌlɛktroʊɪnˌsɛfələˈɡræfɪkli/

microspectrophotometrically

27 lettersscientificextreme

By means of microspectrophotometry, measuring light absorption at microscopic levels.

/ˌmaɪkroʊˌspɛktrəˌfoʊtoʊˈmɛtrɪkli/

thyroparathyroidectomized

25 lettersmedicalextreme

Having had both the thyroid and parathyroid glands removed surgically.

/ˌθaɪroʊˌpærəˌθaɪrɔɪdˈɛktəmaɪzd/

immunoelectrophoretically

25 lettersscientificextreme

By means of immunoelectrophoresis, a technique combining electrophoresis and immunodiffusion.

/ɪˌmjuːnoʊɪˌlɛktroʊfəˈrɛtɪkli/

cholangiopancreatography

23 lettersmedicalhard

Imaging of the bile ducts and pancreas, usually by endoscopic techniques.

/koʊˌlændʒioʊˌpæŋkriəˈtɒɡrəfi/

electrophysiologically

23 lettersmedicalextreme

In a way relating to the electrical properties of biological cells and tissues.

/ɪˌlɛktroʊˌfɪziəˈlɒdʒɪkli/

counterrevolutionaries

22 letterspoliticalmedium

People who oppose a revolution or seek to reverse its outcomes.

/ˌkaʊntəˌrɛvəˈluːʃənˌɛriz/

gastroenterologically

22 lettersmedicalhard

In a manner relating to the branch of medicine dealing with the digestive system.

/ˌɡæstroʊˌɛntəˈrɒlədʒɪkli/

otorhinolaryngological

22 lettersmedicalhard

Relating to the medical specialty dealing with the ear, nose, and throat.

/ˌoʊtoʊˌraɪnoʊˌlærɪŋˈɡɒlədʒɪkəl/

deinstitutionalization

22 lettersgeneralhard

The process of deinstitutionalizing patients, moving them from institutional care to community-based care.

/diːɪnˌstɪtuːʃənəlaɪˈzeɪʃən/

incomprehensibilities

21 lettersgeneralmedium

Things that are impossible to understand or grasp.

/ˌɪnkɑːmprɪˌhɛnsəˈbɪlətiz/

otorhinolaryngologist

21 lettersmedicalhard

A medical doctor specializing in the diagnosis and treatment of ear, nose, and throat disorders.

/ˌoʊtoʊˌraɪnoʊˌlærɪŋˈɡɒlədʒɪst/

sesquipedaliophobia

20 lettersfunmedium

Fear of long words. A shorter, more direct version of hippopotomonstrosesquippedaliophobia.

/ˌsɛskwɪˌpɛdəlioʊˈfoʊbiə/

internationalization

20 lettersgeneralmedium

The process of designing products and services to adapt to different languages, regions, and cultures.

/ɪnˌtɜːrnæʃənəlaɪˈzeɪʃən/

acetylcholinesterase

20 lettersmedicalextreme

An enzyme that breaks down acetylcholine, a neurotransmitter, at nerve synapses.

/əˌsiːtəlˌkoʊlɪˈnɛstəreɪz/

electroencephalogram

20 lettersmedicalhard

A record of electrical activity in the brain produced by electroencephalography (EEG).

/ɪˌlɛktroʊɪnˌsɛfələˈɡræm/

uncharacteristically

20 lettersgeneralmedium

In a way that is not typical or usual for a particular person or thing.

/ˌʌnˌkærɪktərɪˈstɪkli/

gastroenterologist

19 lettersmedicalhard

A medical doctor specializing in diseases of the digestive system.

/ˌɡæstroʊˌɛntəˈrɒlədʒɪst/

telecommunications

19 lettersgeneralmedium

Communication over a distance by technologies such as telephone, internet, and broadcasting.

/ˌtɛlɪkəˌmjuːnɪˈkeɪʃənz/

interconnectedness

19 lettersgeneralhard

The state of being connected with each other; mutual connection.

/ˌɪntərkəˈnɛktɪdnəs/

characteristically

18 lettersgeneraleasy

In a way that is typical of a particular person, place, or thing.

/ˌkærɪktərɪˈstɪkli/

misinterpretation

18 lettersgeneralmedium

An incorrect understanding or explanation of something that was said or done.

/ˌmɪsɪnˌtɜːrprɪˈteɪʃən/

triskaidekaphobia

17 lettersfunmedium

Fear of the number 13. Considered unlucky in many Western cultures.

/ˌtrɪskaɪˌdɛkəˈfoʊbiə/

otolaryngologist

17 lettersmedicalmedium

A medical doctor specializing in disorders of the ear, nose, and throat. Also called an ENT.

/ˌoʊtoʊˌlærɪŋˈɡɒlədʒɪst/

anesthesiologist

17 lettersmedicalmedium

A medical doctor specializing in administering anesthesia and managing pain.

/əˌnɛsˌθiːziˈɒlədʒɪst/

anthropomorphism

17 lettersgeneralmedium

The attribution of human characteristics to animals, objects, or supernatural phenomena.

/ˌænθrəpəˈmɔːrfɪzəm/

entrepreneurship

17 lettersgeneralmedium

The activity of setting up and running a business or businesses, taking on financial risks.

/ˌɒntrəprəˈnɜːrʃɪp/

urogenitourinary

16 lettersmedicalhard

Relating to the urinary and genital systems.

/ˌjʊroʊˌdʒɛnɪtoʊˈjʊrɪnɛri/

rationalization

16 lettersgeneralmedium

The process of making something seem reasonable or logical, often to justify actions.

/ˌræʃənəlaɪˈzeɪʃən/

dermatoglyphics

15 lettersscientificmedium

The study of fingerprints and palm prints for identification purposes.

/ˌdɜːrmətoʊˈɡlɪfɪks/

hippopotamuses

15 lettersgeneraleasy

The plural form of hippopotamus. Large, heavy, semi-aquatic African mammals.

/ˌhɪpəˈpɒtəˌmʌsɪz/

categorization

15 lettersgeneraleasy

The act of placing things into groups or classes based on shared characteristics.

/ˌkætɪɡəraɪˈzeɪʃən/

rehabilitation

15 lettersgeneralmedium

The action of restoring someone to health or normal life through training and therapy.

/ˌriːəˌbɪlɪˈteɪʃən/

responsibility

15 lettersgeneraleasy

The state or fact of being accountable for something, or having a duty to deal with something.

/rɪˌspɒnsəˈbɪlɪti/

sustainability

15 lettersgeneralmedium

The ability to maintain something at a certain rate or level, especially resources for future generations.

/səˌsteɪnəˈbɪlɪti/

sesquipedalian

14 lettersgeneralmedium

Given to using long words; characterized by long words. Also means a foot and a half long.

/ˌsɛskwɪpɪˈdeɪliən/

sesquipedalian

14 lettersgeneralmedium

Given to using long words; characterized by long words. Also means a foot and a half long.

/ˌsɛskwɪpɪˈdeɪliən/

osteopetrosis

14 lettersmedicalmedium

A rare inherited disorder characterized by increased bone density but fragile bones that break easily.

/ˌɒstioʊpɪˈtroʊsɪs/

stereotypical

14 lettersgeneralmedium

Relating to or conforming to a widely accepted but oversimplified view or image.

/ˌstɛriəˈtɪpɪkəl/

infrastructure

14 lettersgeneralmedium

The basic physical systems and structures needed for a society or organization to function.

/ˈɪnfrəˌstrʌktʃər/

onomatopoeia

13 lettersliteraryeasy

The formation of words by imitating the sounds they represent, like "buzz" or "meow".

/ˌɒnəˌmætəˈpiːə/

heterogeneous

13 lettersgeneralmedium

Diverse in kind or nature; composed of different parts or elements.

/ˌhetəˈroʊdʒəniəs/

paradoxical

12 lettersgeneralmedium

Seemingly contradictory but perhaps true; involving contradictions or paradoxes.

/ˌpærəˈdɒksɪkəl/

About Long English Words

Long English words are fascinating examples of how language can be both complex and beautiful. Many long words in English are constructed from Greek and Latin roots, making them combinations of smaller, meaningful parts.

The longest English word in our database is pneumonoultramicroscopicsilicovolcanoconiosis with 45 letters.

Why Learn Long English Words?

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