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.
fets fetus fetas feats fetes foetus fats feds vets fits fiats feeds fates feods foots fades fouettes feuds fatso fyttes footsy vetoes fatties fuddies foodies footies footsie fatuous ghettos fads ghettoes fids fuds vats futz fados fidos foods ghats phots phuts vatus votes
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