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.
hydra hydrae hydria hydriae hydro dura dray draw doura deray durra yttria dourah dry dor dare tyro tray durr dour door duro dire dere tahr deer drew dorr dure dear doer dree tora tyre dore
hydra eyra draw dray dura hydrae hydria hydro