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