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.
sets seats suets setts setous setose sots sits settees sades stows stoas stews sates zetas seeds stoss satis cetes soots suits stays sties sites situs sides suttas suedes sautes suites satays soddies suttees sods suds zits sadis saids sodas sudds sudsy
beets keets whets weets duets deets sets poets pets nets meets lets leets quiets jets bets gets hets haets vets fets rets suets diets tets wets sheets