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.
borrows burrows barrows brows burros browse bros barrios boras brosy burrs bores brose braws birrs boors boars broos biros bourrees brews barres boreas bourse borzoi berries bras burs bars bris brays brios buhrs bries byres braes briss beers buras bursa brees burse bares bears brass birse biers bursae bruise brughs buries braise burghs brassy 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
borrow barrow bourree burro burrow bro brr