Sulfur rhymes with:
sulphur, sulphur, alfre, belfer, colfer, fulfer, golfer, helfer, pilfer, sulphur, telfer, telfor, telfour, wolfer, yourselfer
Sulfur sounds like:
scalfaro, scalper, schlafer, schleifer, schlieper, selover, silber, silvar, silveira, silver, silvera, silveri, silveria, silverio, silverware, silvery, slavery, sleeper, sleepwear, slifer, slipper, slippery, sliver, slobber, sloper, sloppier, slover, solver, sulphur