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.
retear redear reutter retro rater retry ratter retire retore router reader writer rooter rotter rotary redder rioter ritter retiree reedier readier radar ruder redry rotor rider rudery rudder redrew redraw raider ridder rattier rootier rowdier ruddier ruttier
tear retear wheatear tar knotter later hotter metier natter litter tare deair beater deary neater pottery eatery hetero rootier dear biter ritter nettier meatier couter letter sitter jettier nuttier suiter meteor cottar souter rotter voter fattier bittier loiter quitter bootery vetter coater footer seater guitar taro jittery hatter goiter cuter muter cottier powter cater outer hooter hauteur mater star water titer daughter touter dotter niter utter tooter datary watter cedar tattier teeter guttery whiter whitter chatter ottar chattier chitter sheeter shooter peter shutter doughtier tuatera pitier ratter reutter satara fetter lotter pettier totter redear buttery mitier tahr patter ruttier dietary steer nittier setter doter phatter pouter gnattier puttier tater gaiter cattier noter kiter haughtier dotier lottery watery getter neuter oater boater cotter peatier cooter quieter sootier mooter tottery hitter zootier writer hater meter battier votary butter looter tatar matter gater goutier eater bitter cautery tier batter hootier battery cattery titter mattery littery footier notary pater jotter nattier fitter miter heater stare latter cutter better otter rioter rotary liter dieter meeter pewter vetoer rattier quoter mutter guttier nutter citer gutter baiter fatter feater netter knitter knottier tauter nitery auteur deter teary sitar attar router jitter uteri stere stair poutier rater toter waiter rooter potter pottier dater putter matier tetter tuatara dottier wetter whetter whitier wittier chattery petter cheater shatter shittier shouter tatter yatter
rete ret treed reread preed greedy creed fretty fret freed breed arete rite rote retie reedy reed rede reata rate greed greet pretty dreed tret