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.
struck strick stork stark stirk streek stroke strike streak strake strook steric satiric satyric stearic streaky hysteric citric
truck struck whitrack derrick dreck drouk track trick trock hatrack bedrock coatrack mudrock outrock outtrick retrack strick sheetrock
star storey estray suture stroy striae strew starry stere stereo stir store stare stour story stoure stourie stoury straw strawy stray stria strow sutra astray estuary