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.
drouk drogue drek drug dork dirk dark truck trock dorky darky duroc troke tarok drake troak dreck troika druggy drecky darkey darkie derrick druggie turacou drag dreg trek trog trug turk
drouk iroko troke troak peruke grok cruck crook crock croak frock rock euroky brook broke brock ruck rook tarok trock truck
doughier dour doura dourah duro odour router doughtier