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.
flacks flakes flecks flicks flocks flags flics flocs folks flukes folksy folkies flax flaxy flogs flocci
blacks shellacks pollacks slacks lacks placks clacks flacks killicks clicks flocks rollicks balks klicks plucks lacs hillocks slakes lakhs bollocks calks bleaks relocks rowlocks pollocks lucks celiacs talcs shlocks lilacs talks kulaks mullocks cloacas lakes bullocks cloaks flicks chalks killocks slicks clocks tilaks walks cowlicks flakes leaks laics flecks locks blocks licks shellacs clucks shylocks
flack flag flaggy flak flake flakey flaky fleck flecky flic flick floc flock flocky