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.
stern sterna stearin sauterne stearine strain strewn strown cittern styrene seatrain cedarn citrin citron sadiron
tern pattern bittern cittern stern gittern outearn matron sauterne eterne citron pterin cateran veteran torn outturn return diatron sterna deuteron modern moderne outrun biotron terne patron neutron natron tarn retorn attorn citrin turn outran waitron
stere stereo ester asteria sutra strow star stare starry steer stir store storey story straw strawy stray strew stria striae stroy aster astray estray