Polish word: Konstantynopolitańczykowianeczka
Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch
58 letters
Pneumonoultramicroscopicsilicovolcanoconiosis
Supercalifragilisticexpialidocious
I'm not sure how to spell it.
Pneumonoultramicroscopicsilicovolcanoconiosis, but what's funny? Hippopotomonstrosiquipidaliaphobia is the scientific term for the fear of long words.
Lol