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.
doer dor deer dere dory dear door dore dour dorr derry dowry doura deair deary deray doughier dearie dourah tor dry dree tora draw duro tori tory dire tear tier dura tore toro dray durr tour drew torr dare dure terry terra terai teary diary dairy torii durra torah hydro hydra
hoer cooer goer doer wooer shoer er or