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