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.
twiers tawers towers dowers doweries teawares dewars
twiers wearies lowers vowers hewers wears weirs ewers wherries whirries swears wheres sewers dowers rowers towers rewears chawers pawers shewers gnawers wairs whirs sowers cowers viewers haywires boweries beworries bowers worries wooers bewearies wires sawers doweries rewires tawers powers whirrs knowers chewers mowers showers