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.
browner brownier brawnier briner burner barnier branner brinier barrener brainier brannier
browner frowner crowner drowner brawnier brownier ironer corner coroner crooner groaner kroner prawner sorner droner
brownie brown browny baron baronne barony boron brawn brawny briony