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.
dray deray dry draw tray dory dura durra dowry diary dairy derry deary hydra doura hydrae dourah hydria try dor hydriae dour dere dire dear door troy dorr duro dore drew deer tora tory durr dree trey doer dure dare terra terry torah deair hydro tarry teary terai
ray array bewray bray foray fray hooray hurray gray moray pray deray dray tray