5 Longest Word In The World (In Letters) July 17, 2023June 27, 2023 Rate this post 5 Longest Word In The World (In Letters) S. No. Word 1. Pneumonoultramicroscopicsilicovolcanoconiosis 2. Hippopotomonstrosesquippedaliophobia 3. Supercalifragilisticexpialidocious 4. Pseudopseudohypoparathyroidism 5. Floccinaucinihilipilification Source: Wikipedia Sharing Is Caring: " target="_blank" rel="nofollow">