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.
fats feats fiats fates fatso fads vats fets fits fatuous fatties foots vatus fetus fetes fades fetas fados ghats footsy fyttes foetus ghauts footsie footies futz fuds vets fids fouettes feds feeds feods feuds fidos foods phots phuts votes
bats hats seats peats oats gnats lats meats goats kats gats coats cats heats wheats wats cheats tats vats beats qats teats doats rats pats neats mats moats ghats boats eats fats feats fiats chats whats shoats