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.
troy try toro taro tray tyro tiro trow tory trey trio terry tarry teary dry tor tar tear true tier tyre torr tire tour tahr duro tora tori tare dray dory tore tree deray tarre dowry deary terai dairy torii torah terra hydro diary derry