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.
sesame seism cesium
sesame same seam seme smew some assume coassume lissome misaim noisome reassume resume disme woesome
seas assais seises seesaw seis seise sews sues sees eses assays essays mesas oses resaws resays seesaws uses