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.
doornail diurnal trenail tornillo treenail diurnally darnel tarnal trinal tarnally triennial triennially
doornail renail trinal treenail renal vernal hernial hornily journal carinal carnal corneal cornily cornual coronal neuronal diurnal tarnal trenail urinal