As of now, there aren't any geophysical features on Pluto to supply with names. That's because, as of now, even the sharpest images of Photo don't reveal much more than a series of colored blurry blobs. The same goes for Pluto's moon Charon.
Even Hubble, capable of capturing massive galaxies in stunning detail, can't exactly show astronomers the secrets of Pluto's surface. As of now, Hubble's photographs of Pluto and its moon are the best astronomers have.