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.
patsy pats potsy peats pates patois pets pits patties pads pots puts paduasoy poets putts pitas pouts padis pities pitsaw pottos petsai potsie pittas pietas paddies pieties poetess poetise potties paydays puttees putties piteous peds pods puds putz
patsy bats neats tootsy bates hates ghauts dauts pats gaits mauts baits lats cats peats heats kats mats daisy vatus gnats gutsy jatos paduasoy shiatsu chats wats tauts ditsy dates oats feats whats aits tates meatus satis bahts rates coats rats gats riatas footsy ates bitsy qats moats vats beauts mates katas hats batts cates eats hiatus matts cutesy pates datos ghats haets boats teats nates goats outsay fats meats fiats reatas gates ratos coatis potsy fates sates doats cheats beats watts fatso nutsy seats dawts tats waits wheats shoats
pat pate pattee pattie patty paty peat peaty spat spate