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.
witchery witchier watcher wisher washer washier
botchery bitchery witchery cutchery hatchery lechery butchery ochery ochry tetchier richer poachier beachier hitcher lecher etcher peachier achier teacher toucher botchier beechier catcher ocher notcher patchier botcher pitchier cheer leacher reacher moocher sherry witchier hatcher batcher coacher matcher coucher ditcher pouchier cherry patcher techier cheery itchier leachier touchier reechier tocher butcher watcher gaucher bitchier fetcher voucher peacher echoer poacher chary fishery catchier tushery pitcher chichier
witch witchy wich watch which switch twitch twitchy