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.
return returnee retorn retrain retrainee readorn redrawn
turn return outturn diatron cittern citrin diuron matron retorn patron outran notturno notturni neutron natron bittern attorn torn tern tarn durn gittern outrun citron pattern stern biotron waitron
retear retire retiree retore retro retry reutter fretter frettier pretor prettier ureter