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.
sterna stern stearin sauterne stearine strain strewn strown cittern styrene seatrain cedarn citrin citron sadiron
sterna madrona terne sauterne cittern pterin pattern outearn moderne modern cateran tern gittern veteran eterne bittern trona stern deuteron
stere stereo ester asteria sutra strow star stare starry steer stir store storey story straw strawy stray strew stria striae stroy aster astray estray