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.
denuder dander tender dandier daunder denture denature tinder tenter daunter tentier tindery daintier tinter dinitro donator taunter
nuder denuder vender lender bindery bonder binder pander randier ponder render meander minder hander sander bendier bounder sender gander sonder hinder sunder gender dander bender daunder tender tindery undoer winder wonder lander finder cinder snider fender fonder minuter pounder pinder reindeer maunder mender launder rounder kinder cindery ender joinder sandier handier sounder hounder zander funder dandier founder endear bander tinder under wander windier yonder