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.
browny brown barony briony brawny brownie brawn barny boron briny baron barney brainy branny baronne bren born barn brin burn bran brine brain borne bairn bruin buran burin bourn barren borane boreen bourne burnie byrnie biriani
browny barony brawny briony brown frown horny irony corny crony crown grown porny drown
brow bro biro braw brew brio broo