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.
flacon falcon flagon volcano
flacon balcony falcon flagon helicon silicon silicone
flack flag flaggy flak flake flakey flaky fleck flecky flic flick floc flock flocky