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.
baronies brownies baronnes brionies baroness barons brinies byrnies barneys burnies barns bareness brines browns bairns borons bronze brownness boranes bournes barrens barrenness birianis brins burns brens brans beeriness brownnose bronzy burins bourns burans bruins brains brawns boreens burnous burnoose
baronies cronies brionies ironies irones trones crones drones crannies ornis carnies guaranies ironize greenies grannies heroines baroness byrnies groynes burnies neurones brownies pyrones brinies trannies baronnes tyrannies
baron baronne barony barn bairn barney barny boron briony brown brownie browny