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.
shays sheas chays shahs shaws shaughs shes shies shoos shews chais chaws chaos shoes chase shows chaise chasse sheughs
hays shays chays ays has bays lays nays pays says hazy chaos whys mays hahs chias shaws phase sheas chaws jays haes quays kays hyps cays rays gays days wheys fays shahs chais hoys chase haws ways yays
shay sha shy chay shah shaugh shaw shea ashy pshaw