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