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.
reindeer render reinter renter randier reenter rentier rounder reuniter ranter reentry runtier renature
reindeer nuder randier ponder render maunder mender launder sander cinder sender joinder kinder handier sunder hounder sonder dander funder daunder founder tender vender tindery finder undoer fender winder fonder wonder pander ender bounder sounder pinder endear pounder rounder meander minder lender sandier cindery snider gander lander hinder zander bander gender dandier bender denuder bendier tinder hander under bindery wander bonder windier binder yonder
rend rind reendow reigned reined rindy grind trend trendy