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.
maturate matured maturity mattered moderate metred mitred motored moderato muttered
maturate saturate deuterate striate literate citrate reiterate rehydrate patriate outrate nitrate moderate deaerate quadrate iterate federate butyrate hydrate derate stearate dehydrate titrate