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.
cruck crock crick crack cracky carack crickey croc cork carrack cark croak corky crook creek crake creak creaky crikey croaky carioca curacao curacoa crag grok kirk
ruck cruck truck drouk rock trock track dreck rerack peruke crick wreck crock crack carack reck rick wrack derrick trick wrick barrack arrack brick brock frock verruca hayrack hayrick rack prick carrack