Punkin rhymes with:
dunkin, dunkin', junkin, younkin, conkin, dunkin, dunkin', hankin, henkin, jenkin, junkin, mankin, minkin, patinkin, rankin, thinkin, thinkin', tonkin, younkin
Punkin sounds like:
pankonin, panmunjom, pengassan, penguin, pennsauken, pension, penson, phoenician, pi-meson, pinckney, pinkham, pinkney, pinshan, pinson, pinzon, pomicino, ponchan