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.
dater deter doter tater daughter dieter deader dotier datary tatter tauter dotter datura tuatera dottier tattier tattooer tetra toter tetri tatar titer doughtier tedder deodar tooter detour dodder teeter totter tetter touter titter tidier deedier deodara dietary doddery dowdier tottery tuatara
beater pater seater eater cheater dater neater heater later gater rater oater coater hater feater cater water tater boater mater goutier jotter gator lotter latter littery hootier kiter cattier gnattier nattier matter hitter gaiter guttier knotter quoter voter eatery meteor cautery battier steer peatier setter mattery cottier pouter muter nitery ratter bootery pitier quatre nuttier metier router tuatera puttier rootier beader litter hetero looter satyr rioter reader bittier ritter utter waiter sootier watery tauter writer wetter titter tatar wittier whitier hetaera chattery tetter netter shader sheeter dotier shooter tottery shutter deader whetter peter dieter fatter phatter toter loader mooter lottery hooter fetter pottery tatter cutter fader knitter pettier better reutter gutter liter powter cuter vetter leader noter cattery jitter miter hauteur hatter nittier nutter batter dottier jittery goiter neuter guttery battery niter loiter meeter quitter souter meter petter footer pewter meatier pottier cotter hotter outer couter cooter tier footier ruttier auteur lader butter kneader jettier fattier cuatro mutter vetoer matier biter bitter fitter quieter suiter dotter patter poutier putter titer deter tooter touter nettier header doughtier haughtier knottier sitter daughter mitier otter retear tear letter viator rotter natter rattier buttery whitter tattier uteri wader getter citer watter rooter doter wheatear potter stere whiter chatter zootier chattier teeter chitter shatter shittier totter shouter baiter yatter
date dated doated dauted rated dawt sated pated lated dato datto daut dautie dawtie mated doat dite dote tate bated fated hated gated data dawted doted