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.
beer beery bree bier bear berry bewray bar bro bra bur brr bourree brrr bury broo brow bora brio brae bray birr brie braw boar bare biro buhr bura brew burr bore boor byre barre brugh burgh burro burry
beer veer jeer queer leer peer seer deer weer cheer sheer er