I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
stearin stearine stern seatrain strain sauterne cedarn citrin sterna strewn strown citrine cittern sadiron styrene citron
stearin outearn pterin cedarn stearine uterine
star satara sitar stair stare starry steer stere stereo aster asteria ester