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.
gawkily quakily cockily guaiacol cackle gaggle goggly googly quickly
gawkily pawkily hokily ickily jokily cockily quakily leakily luckily muckily pockily pokily tackily wackily cheekily shakily