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.
birk birkie bark berk bork brake brick burke brock barky brook braky broke break burka berake bricky barrack berg brag burg brig barca baric boric bourg burqa
birk irk kirk quirk mirk dirk chirk shirk