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.
treacle treacly trickle truckle tergal draggle trickly trickily turrical darkle trigly
treacle rackle regale borecole freckle caracole coracle crackle grackle miracle oracle treacly
track triac turaco turacou streak streaky