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