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