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.
candor candour cantor condor canter gander contour quandary coendure qindar kantar kinder gantry cointer counter country gaunter gauntry keynoter quainter
vendor condor candor tundra undoer daunder tender sunder zander sander sonder pounder rounder pandore pinder minder pandoor maunder fender chantor winder indri laundry lander candour kinder finder fonder mender joinder hander vender funder foundry founder hounder bounder indoor binder launder meander bander gender gander qindar hinder cantor bonder andro bandora bandore bender mentor pander lender sundry wonder wander under tinder tandoor dander sounder ender sender cinder render ponder pandour pandora yonder
candy caned canid canned cannot canoed cant canto canty cnida cnidae condo scandia scanned scant scanty