Medically reviewed by Steven Gans, MDMedically reviewed by Steven Gans, MD Hippopotomonstrosesquippedaliophobia is the fear of long words. Also known as ...

Sesquipedalophobia is, ironically, the fear of long words. In a cruel twist of fate, there’s also hippopoto-monstro-sesquipedaliophobia, which some use to describe the fear of very long words.