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.
indri indoor inter intro interrow
indri fender ender bonder mender ponder pander render laundry maunder lander sender cinder sounder kinder condor sundry fonder dander joinder tender bender tundra binder wander hinder wonder bounder bander andro gander founder funder meander pinder minder pounder launder lender qindar sander rounder sonder candor finder sunder hounder zander gender daunder vendor tinder vender under hander winder foundry yonder