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.
crambos cramboes crambes crams cramoisy crumbs creams corymbose corymbous cramoisie corymbs cormous corms grams caroms crimes cremes gramas carroms grumous curiums grammes grammas grumose crummies gouramis gorms gouramies kermes kormas kermis grooms karmas grumes grimes kermess kirmess quorums
crambos ramose ramous biramose biramous corymbose corymbous crambes cramboes paramos choriambs
crambe crambo cram caramba cream creamy crumb crumby scram