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.
weekly weakly wackily waggly wiggly
meekly weekly shakily cockily pockily packly muckily feckly fickly vaguely hackly hokily kelly ickily sickly quakily jokily quickly leakily likely luckily knuckly pawkily pokily tackily weakly gawkily wackily cheekily shekel