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.
barrows barrios borrows burrows brows barres browse burros bars bros braws brios broos boars birrs burrs biros bears bares brosy brose brews berries bras burs bris bourrees boras birse braes buras byres brees buhrs bries bores brass beers burse briss biers boors brays brughs buries braise boreas brassy borzoi bourse burghs bruise hybris bewrays brassie bureaus
arrows barrows furrows sorrows farrows burrows yarrows marrows morrows narrows borrows harrows rows barrios churros cirrous trows ferrous drowse vrouws frows morros grows browse crows serows frowsy burros vrows prows brows drowsy cirrose charros karroos
barrow barre barrio borrow burro burrow bar bro brr