Potato

If GH can stand for P as in Hiccough

If OUGH stands for O as in Dough

If PHTH stands for T as in Phthisis

If EIGH stands for A as in Neighbor

If TTE stands for T as in Gazette

If EAU stands for O as in Plateau

Then the right way to spell POTATO should be: GHOUGHPHTHEIGHTTEEAU

I've had enough!