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