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.
deter dieter dater doter tetter dotier dotter teeter deader detour deedier dottier dietary daughter tater titer tetra toter tetri doughtier totter tauter touter titter tedder dodder datura deodar tidier tooter tatter datary deodara doddery dowdier tattier tottery tuatera tattooer
quieter sheeter meter deter meeter teeter dieter peter oater lottery matier goutier voter rattier tier hatter knitter footier jittery biter couter better poetry cattier rotter jitter gutter goiter seeder zootier heater mattery batter buttery poutier potter kiter rootier dotter haughtier mutter battery ritter fitter guttery quitter doter jettier mitier nettier ratter baiter hetero hauteur fetter metro bittier lieder suiter router pettier tottery tuatera utter setter water watter tetra wetter footer coater whitier rater wittier chattery tauter cheater tetter chitter netter shooter titter shutter nittier whetter letter doughtier feeder fattier beater toter miter later tatter niter retro eatery litter cotter metre needer gater mooter stere reutter dater cottier vetoer cater pottier putter retry hotter tater meatier hater looter dotier heeder pouter matter quoter bootery eater hootier muter meteor seder metier writer pater puttier liter cuter rioter souter fetor powter deer citer ceder nattier cattery noter lotter nuttier retear getter loiter battier jotter butter mater knotter fatter heder feater foetor hooter outer knottier nutter sootier patter steer sitter pitier phatter auteur tooter gnattier gaiter seater pottery bitter neater littery ruttier otter hitter guttier rooter cutter petter cautery nitery pewter neuter vetter latter titer dottier cooter totter touter uteri peatier waiter watery boater weeder tear wheatear natter whiter whitter chatter tattier chattier tetri cheder shatter shittier shouter daughter yatter
date feted dueted doted dieted deeded dated meted duet deed dote dite diet deity deet deedy duetted