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.
brawny brawn browny branny brainy bran barny briny brown brain buran briony borane barony barney brownie biriani barn brin burn bren born borne bruin bourn boron baron brine bairn burin barren boreen bourne burnie byrnie baronne
brawny rainy barny brainy branny brawn browny carny cranny grainy granny prawn drawn tranny tyranny sharny
braw bra bora brae bray brew brow bura