There are a lot of interesting and random phopias out there. Dendrophobia is the fear of trees. Blennophobia is the fear of slime. And neophobia is the fear of anything new. However, the fear of long words may have the most ironic (and cruelest name).
Hippopotomonstrosesquipedaliophobia. So let's say you do have this phobia. You'd be terrify to name your ailment. Kind of a conundrum.