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