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.
dry dory dray deray derry deary dairy diary dowry try dor dour dura drew tray dare deer troy duro doer dear draw durr dire dree tory dere trey dure dore dorr door doura tarry terry durra hydro hydra teary deair dearie dourah durrie hydrae hydria