Question 1

What is the longest word in the English language?

Accepted Answer

In a dictionary: pneumonoultramicroscopicsilicovolcanoconiosis (45). By letter count: titin's 189,819-letter chemical name.

Question 2

How do you pronounce the longest word in English?

Accepted Answer

In 19 syllables: nyoo-muh-noh-uhl-truh-my-kruh-skop-ik-sil-ih-koh-vol-kay-noh-koh-nee-oh-sis.

Question 3

What are the 2nd and 3rd longest words in English?

Accepted Answer

In dictionaries: the 2nd is supercalifragilisticexpialidocious (34 letters), and the 3rd is pseudopseudohypoparathyroidism (30 letters).

By letter count: the 2nd is the 1,909-letter E. coli protein name, and the 3rd is the 1,185-letter full chemical name of the tobacco mosaic virus's coat protein.

Question 4

How many letters are in hippopotomonstrosesquippedaliophobia?

Accepted Answer

36, with the standard double-P spelling.

Question 5

What is the longest common English word?

Accepted Answer

Uncharacteristically (20), the longest typically found in ordinary prose.

By language

40+ Longest Words in English (With Meanings & Pronunciations)