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.
poetises poetizes poetesses potsies ptoses poeticize patsies petasos petasus petsais ptosis putzes pitsaws
betises mitises cutises poetises tootses situses ptoses lotuses poetizes metisses quietuses patsies coituses notices caddises mitoses lotoses iodises outsees footsies ketoses latices stases radiuses potsies mutases hiatuses daises daisies lattices dieses disses fatsoes fetuses meatuses foetuses tootsies
poetise poetize pieties poetess poets potsie potties peptize