Penson rhymes with:
bensen, benson, carstensen, denson, ensign, genson, hensen, henson, jeansonne, jensen, jenson, jenssen, rencen, stenson, svenson, svensson, swensen, swenson, venson
Penson sounds like:
pankonin, panmunjom, pengassan, penguin, pennsauken, pension, phoenician, pi-meson, pinckney, pinkham, pinkney, pinshan, pinson, pinzon, pomicino, ponchan, punkin