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.
bur bury bura buhr burr burry burgh burro bro bureau bra brr burrow bar bourree beer brae birr biro broo brow brie bare bore brrr brio boar brew boor braw bray bree bora bear bier byre berry brugh barre beery barrio barrow bewray borrow