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