Actually, @ETpro, it isn’t.
You are confusing hippopotomonstrosesquippedaliophobia with hippopotomonstrosesquipedaliophobia. Hippopotomonstrosesquippedaliophobia is a word that I made up. It has the exact same meaning as hippopotomonstrosesquipedaliophobia, but hippopotomonstrosesquippedaliophobia is just coincidentally one p longer than hippopotomonstrosesquipedaliophobia, so that may be why you think I am mistaking hippopotomonstrosesquippedaliophobia with hippopotomonstrosesquipedaliophobia. Hippopotomonstrosesquippedaliophobia, though less common, is my alternative to the synonym hippopotomonstrosesquipedaliophobia. I wish you well.