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.
viewers vowers
ewers viewers shewers chewers sewers hewers dowers pawers swears mowers rewears powers towers sewars chawers lowers knowers sawers weirs rowers sowers cowers dewars vowers tawers bowers twiers gnawers wears showers