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.
tor tore tory tori tora tour toro torr torii torah tar dor try tree door trio tiro troy tyro dorr dory tare tear true dore tray trey tahr tyre trow doer tier dour taro tire terry tarre doura tarry terra terai teary dowry dourah terrae yttria