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.
endear ender enter endure enduro entera entry entire entree
endear bender kinder quandary joinder randier ponder render handier hounder founder sander cinder sender needer vender nodder sonder bander wonder sunder finder dander nuder daunder needier maunder tender tindery launder undoer mender winder pander kneader binder hinder funder ender sandier rounder cindery fonder hander snider reindeer pinder pounder gender qindar gander boundary bindery bendier denuder minder wander meander under lander tinder lender windier bounder dandier bonder zander fender sounder yonder