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.
turk turkey trek troke tarok traik track trock trike truck troak trick turaco troika tricky turacou touraco trickie dark dirk dork drek trig trog torc trug dorky toric taroc duroc trigo drouk triac drake dreck terga darky