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.
sheas shes shahs shaws shoes shays shies shews sheughs shaughs chias shows chess chase chews shoos chasse cheese cheesy wyches chez
sheas has hes wheys haes ease beaus hues phase queasy seas pease chaos chaws toeas chess chias shaws lease ghees hahs shews shoes yeahs teas peas easy haws shies hehs tease fease zoeas hews hies hoes keas shes leas wyches hays cease whews chais chase chays chews shahs shays yeas
shea sha she shah shaugh shaw shay sheugh shew shoe pshaw sheesh sheuch