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.
design dizen dozen diazin disown decennia
assign resign sign design cosign reassign sin mission cuisine sinh eosine sine resin passion casino eosin cassine fusain sain essoin cassina lysin session rosin fission raisiny raisin cession lysine cousin hessian cosine casein rosiny ossein scission cassino resiny basin casini rusine sasin seisin quassin
dees deice dews deys dies does dues ides odes deities