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