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.
refry refer reefer refire revery reifier reoffer referee reefier rifer river raver rover reaver reiver revere riever roofer reverie riviera rougher
refry fry chiefer wafery defer revery reefer veery refer puffery ferry fiery fray fury faery knavery affray every kefir quavery quivery liefer livery very sphery defray wavery shivery
ref reef reefy reif reify rereview reroof tref trefah