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.
duro dura durr dure dour hydro doura durra dourah durrie dor dry dray dere taro door trio dire dree toro dare troy trow drew dory dear dorr draw deer tour doughier dore tiro doer tyro derry diary dowry hydra dairy deair deary deray