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.
bier bear birr beer biro brie berry beery bewray brr bur bro bra bar brrr bury brae boor broo bora brio brew boar buhr braw bree bare bura bray burr bore brow byre barre brugh burgh burro burry
bier vier gooier kier lier pier wrier zooier doughier tier shier er