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.
hetero heater hetaera hater heder hetaerae heeder header hitter hooter hatter hotter hauteur headier hetaira hootier hatteria hetairai hider haughtier hoodier
hetero sitter guttery writer jotter ratter meteor netter toro fattier outer goutier tauter nattier tatter oater footer mater knottier doter doughtier watter rootier cutter pouter deter powter cottier haughtier getter ritter pater nittier nitery meatier seater vetter loiter cautery matter hitter litter pitier taro strow puttier metier pettier router tiro cuatro whitter cattery dotter souter peatier toter wheatear cooter whiter tottery heater titter chatter fetter tuatera pottery chattier stere chitter phatter sheeter troy shooter suiter tetter shutter dater utter gater bootery neuter kiter buttery retear mutter mooter reutter trow bittier hootier later water jitter knitter letter hater biter miter peter tier lotter trio quitter nutter eatery setter matier hotter rioter outrow nitro niter mattery citer vetoer littery cattier tear cotter liter pewter tyro stereo putter meter petter rotter battier couter hatter poutier cater tattier gutter ruttier jittery rater meeter neater battery fatter otter goiter natter daughter tater nuttier fitter lottery knotter dieter dottier watery rooter cuter pottier whitier dotier eater waiter guttier butter rattier muter mitier retro baiter bitter hooter quoter jettier boater gnattier latter voter better metro pedro beater looter batter quieter noter nettier gaiter sootier touter patter tooter wetter coater whetter totter hauteur titer wittier feater potter uteri chattery steer cheater footier shatter auteur shittier stroy teeter shouter zootier yatter