Home » How to What is the longest word in English? March 15, 2024May 15, 2023 by Alex Let’s see below the longest word in English. Pneumonoultramicroscopicsilicovolcanoconiosis Supercalifragilisticexpialidocious Antidisestablishmentarianism Floccinaucinihilipilification Sharing Is Caring: Leave this field empty if you're human: