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.
drew dree draw dare dire dere dore dure hydrae durrie dearie dor dry hydriae dura deer trey dour true door dory tore dray durr tree tire duro dear tyre dorr trow doer tare durra diary deray deary tarre deair hydra doura dairy hydro dowry derry