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.
bren barren boreen barn burn born brin bran barny bruin brine borne brain bourn brawn boron burin brown bairn baron briny buran branny burnie borane bourne brawny browny barney barony briony brainy byrnie baronne biriani brownie
wren barren bren siren syren warren chirren