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.
cordon cardon cardoon craton croton cortin carton cartoon guerdon cortina crouton gueridon cartoony cretonne cowritten cretin gradin garden carotin curtain gradine creatin carotene carrotin creatine gardenia guardian
bourdon guerdon lardon cardon pardon cordon cardoon teardown burden parton harden lurdan foredone bridoon fordone redone carton radon garden burton gueridon verdin lardoon jordan bradoon drawdown redon warden
cord corrida cocreate curd cruddy credo cred cowrote cowrite court corrody corrode corrade card corody cored cardio cardiae cardia crud crude curdy scored