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.
retrim redream
trim retrim term tram yttrium atrium hadarim natrium sedarim siddurim storm strum sudarium deuterium chadarim chetrum
retry retro rewriter reorder prettier pretor frettier fretter retore reutter retiree retire retear redry redrew redraw ureter