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.
brow bro burrow borrow barrow biro braw brio brew broo burro barrio brr bar bra bur bury bree burr bura bore beer buhr brie brrr bear bray boar bier bare brae bora boor birr byre barre beery berry brugh burgh burry
row vrow trow serow narrow morrow marrow grow crow harrow furrow arrow frow farrow burrow brow borrow barrow prow sorrow yarrow