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.
titrate tittered deuterate tetrad tetrode tutored tattered tottered dehydrate detrude
nitrate citrate titrate outrate dehydrate reiterate deuterate striate strata stearate deaerate torte trade trait treat derate trite hydrate butyrate iterate nitrite maturate attrite outtrade rehydrate retreat literate patriate saturate federate strait moderate strati quadrate