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.
prechose prechoose preaches preshows purchase prochoice parches perches porches parchesi parchisi parcheesi parritches parishes perishes parashahs
prechose rechose rechoose reechoes huarachos marchese prechoose purchase
parch perch porch preach preachy preshow