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.
fishery fisher fishier fetcher voucher
fishery tushery cherry ashier fisher botchery bitchery busher lusher mosher meshier mushier dishier kosher ochery gushier posher gasher pushier cushier rusher hatchery dasher cashier usher washier witchery butchery lasher bushier shear quasher fishier sherry shier sheer masher musher mishear nosher lechery shoer pisher kasher pusher gusher rasher cutchery rushier josher dashier cosher cheery basher washer wisher shusher