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.
barn barny baron bairn barney barony barren born brin bran burn bren baronne burin bourn boron brawn brine bruin brown buran brain borne briny brawny burnie browny briony brainy branny bourne boreen borane byrnie biriani brownie
barn earn carn karn learn reearn darn tarn warn sharn yarn yearn