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.
bark barky berk birk bork barrack braky brook burke break brock barca broke burka brick baric brake barque birkie bricky berake baroque brookie berg brag brig burg boric bourg burqa
ark bark hark cark quark lark mark nark park sark dark wark chark shark