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.
casino cassino casein casini cassina cassine cosign cosine cousin caisson cassena cassene cuisine quassin
casino cassino sin casein fusain cosine passion paesano mission lysin cuisine eosine fission basin besnow hessian raisiny resign resiny rosiny cession scission session essoin eosin assign casini rosin rusine reassign resin cassine quassin raisin paisano sain seisin sasin ossein lysine sine sign cousin sinh cosign cassina snow design
casa case cassia cause causey caws cays cosie caiques ocas