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.
caulk calk clock cluck kulak cloak click cleek clack kulaki claque calque calico colicky cowlick quaylike clag clog klik colleague
caulk baulk chalk taluk talk sulky sulk pulik kulak calk hulk hulky bulky bulk baulky balky balk alky talky walk chalky
caul coaly scaly scale oculi aculei cully cullay cull coulee coala call coal calo callow callee calla scall scull