Posthole rhymes with:
pothole, blowhole, buttonhole, cubbyhole, foxhole, keyhole, loophole, manhole, mousehole, pigeonhole, pinhole, pothole, sinkhole
Posthole sounds like:
pactel, pastel, pastula, pestillo, piccadilly, piscitelli, piscitello, pistil, pistilli, pistol, pistole, pizzitola, pocatello, postal, postel, postell, postle