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.
teacher techier tetchier tocher ditcher toucher touchier dasher dashier tushery deciare dishier
coacher poacher peacher teacher leacher reacher cheer botchery cutchery poachier moocher tetchier etcher pitcher pouchier washer beachier butchery toucher hatcher ocher patcher lecher gaucher achier butcher bitchery richer ditcher techier tocher touchier watcher witchier fetcher witchery masher matcher itchier bitchier beechier catchier quasher lasher coucher pitchier patchier botcher rasher gasher catcher leachier echoer lechery hitcher notcher ochery peachier reechier dasher batcher kasher hatchery basher botchier voucher chichier
teach tach tech tache techie techy tetchy teuch