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.
brassy brass bras brassie braes braws buras briss brosy brays boras boreas braise bureaus bewrays bros burs bris bars bears bores brees brows biers beers byres boors birrs brose brews buhrs biros brace bares burrs boars brios birse bursa burse bries broos braze braza buries bruise braize bursae barres burghs bourse browse breezy burros brughs hybris barrios barrows berries borrows burrows bourrees
grassy brassy morassy grass trass cuirass dressy prissy morass greasy creasy cressy crass harass frass brass wrasse drossy tressy