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.
grammas gramas grammes grams gorms gremmies gouramis crams gouramies grimes grumes kormas creams karmas grooms crambes grumous crambos grimace grumose cramoisy cramboes crummies corms cramoisie kermis cremes crumbs kermes crimes caroms carroms cormous corymbs curiums kermess kirmess quorums
grammas brahmas gramas grammes karmas dioramas dramas taramas traumas
gramma gramme gram grama gremmie gremmy