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.
flackery flickery flaker flakier flicker flockier folkier flukier flagger flaggier flogger filagree fillagree fulcra valkyr velcro vulgar
flackery flickery slicker pluckier lacker licker locker luckier blacker blocker blockier flicker flockier clacker clicker clocker colickier plucker slacker shlockier
flack flak flake flakey flaky fleck flecky flick flock flocky