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Longest Words in the English Language

This list features the longest words in the English language.

RANK

WORDS

NUMBER OF CHARACTERS

1

Pneumonoultramicroscopicsilicovolcanoconiosis

45

2

Hippopotomonstrosesquippedaliophobia

36

3

Supercalifragilisticexpialidocious

34

4

Pseudopseudohypoparathyroidism

30

5

Eellogofusciouhipoppokunurious

30

6

Floccinaucinihilipilification

29

7

Antidisestablishmentarianism

28

8

Psychoneuroendocrinological

27

9

Honorificabilitudinitatibus

27

10

Electroencephalographically

27


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References

Worldwide Interpreters. (2023). 10 longest words in English. Retrieved from https://worldwideinterpreters.com.au/2023/06/11/10-longest-words-english/ [Accessed 1 December 2025]. Grammarly. (n.d.). 14 of the longest words in English. Retrieved from https://www.grammarly.com/blog/14-of-the-longest-words-in-english/ [Accessed 1 December 2025]. Iris Reading. (n.d.). 10 longest words in the English language. Retrieved from https://irisreading.com/10-longest-words-in-the-english-language/ [Accessed 1 December 2025]. Berlitz. (n.d.). Longest word in English. Retrieved from https://www.berlitz.com/blog/longest-word-english [Accessed 1 December 2025]. Cambridge Dictionary. (n.d.). Pneumonoultramicroscopicsilicovolcanoconiosis. Cambridge Dictionary. Available at: https://dictionary.cambridge.org/dictionary/english/pneumonoultramicroscopicsilicovolcanoconiosis [Accessed 1 December 2025]. Collins Dictionary. (n.d.). Hippopotomonstrosesquippedaliophobia. Collins Dictionary. Available at: https://www.collinsdictionary.com/submission/6487/hippopotomonstrosesquippedaliophobia [Accessed 1 December 2025]. Cambridge Dictionary. (n.d.). Supercalifragilisticexpialidocious. Cambridge Dictionary. Available at: https://dictionary.cambridge.org/dictionary/english/supercalifragilisticexpialidocious [Accessed 1 December 2025]. National Institute of Health. (n.d.). Pseudopseudohypoparathyroidism. Rare Diseases. Available at: https://rarediseases.info.nih.gov/diseases/7860/pseudopseudohypoparathyroidism [Accessed 1 December 2025]. Collins Dictionary. (n.d.). Eellogofusciouhipoppokunurious. Collins Dictionary. Available at: https://www.collinsdictionary.com/submission/23363/Eellogofusciouhipoppokunurious [Accessed 1 December 2025]. Cambridge Dictionary. (n.d.). Floccinaucinihilipilification. Cambridge Dictionary. Available at: https://dictionary.cambridge.org/dictionary/english/floccinaucinihilipilification [Accessed 1 December 2025]. Cambridge Dictionary. (n.d.). Antidisestablishmentarianism. Cambridge Dictionary. Available at: https://dictionary.cambridge.org/dictionary/english/antidisestablishmentarianism [Accessed 1 December 2025]. Oxford English Dictionary. (n.d.). Psychoneuroendocrinological (adj.). Oxford English Dictionary. Available at: https://www.oed.com/dictionary/psychoneuroendocrinological_adj [Accessed 1 December 2025]. Collins Dictionary. (n.d.). Honorificabilitudinitatibus. Collins Dictionary. Available at: https://www.collinsdictionary.com/submission/150/Honorificabilitudinitatibus [Accessed 1 December 2025]. Dictionary.com. (n.d.). Electroencephalograph. Dictionary.com. Available at: https://www.dictionary.com/browse/electroencephalograph# [Accessed 1 December 2025].
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