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.
creams crams cremes crambos crambes grams corms cramboes cramoisy gramas crumbs caroms cramoisie crimes carroms grammas cormous grammes corymbs curiums crummies gouramis gremmies gorms gouramies corymbous karmas kormas grooms kermes grumes kermis grimes grumous kermess kirmess quorums kermesse
breams creams dreams reams forams taramas dirams rems marrams gramas proems praams harems derms charms trams permease seriemas frames cremes ihrams farms crams germs drams arms hareems jorams herms biremes arames rams prams perms paramos grams gouramis warms harms terms roams berms ramus rearms zirams dioramas dramas barms choriambs
creamy cream caramba coremia cram crambe crambo creme scram scream