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