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.
brawns brans burans brains browns boranes brins burns brens barns birianis brownies bairns bourns bruins burins brownness barons brownnose borons brines burnous boreens barneys barrens burnies bournes brinies byrnies bareness baronies baronnes burnoose brionies baroness beeriness barrenness bronze bronzy
brawns prawns parians birianis piranas murrains lorans karns barns grans guaranas currans cranes roans ranis ruanas puranas reearns saurians darns drowns tarns terranes trans sharns yarns harianas boranes marranos groans brains browns burans earns frowns furanes brans furans carns crowns grains guaranis learns rains pyrans sarans serranos drains durians terrains trains warns shorans yearns
brawny brawn borane brain brainy bran branny brown brownie browny buran