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.
sundry sunder sounder sentry snider sonder sander sender cindery saunter sandier sanitary sinter santir santur cinder zander santour century senator santoor santero santera centaury santeria snootier snottier snoutier
foundry laundry sundry gantry tinder tundra zander daunder founder kinder condor wintry candor gentry indri vendor ender hinder launder ponder chantry wander finder gauntry entry lender meander minder pantry quandary reentry rounder cindery sender sonder sunder fonder fender joinder bender andro mender lander qindar bindery binder boundary bander hounder vender hander gender country pander pinder bounder maunder winder under tindery tender dander funder bonder gander sounder sentry sander cinder render pounder wonder yonder
sundew sundae sand sandy saunaed send sned snide sonde sound suint sunned