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.
cardon cardoon carton cordon carotin cartoon cartoony carrotin carotene craton garden croton guerdon crouton cretonne gardenia guardian gueridon cortin cretin gradin creatin curtain gradine quartan creatine
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
card cardia cardiae cardio carroty scarred credo ecarte carrot acarid cord garda carte curd cart cruddy crud carried caried caret crude cared curdy carate gardai carat acaroid caird scared cred scart