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.
bork bark berk birk boric barky brook burke brock break broke braky brake burka brick bourg berake birkie bricky barrack brookie berg brag brig burg barca baric burqa