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.
snider sander sonder sender sunder sandier sounder snootier snoutier snottier sinter zander santir sundry cinder saunter santero santera cindery santeria sanitary sanitoria sanitaria sonneteer center santur sentry santoor santour senator
snider nuder pounder tinder nuttier fonder endear zander rounder joinder mintier bander meander hinder cinder funder lintier minaudiere nodder fender pointier launder hander rentier wonder winder under tender dander sounder reindeer binder uniter gnattier daunder pander snoutier bender sander gender sender kinder snootier bonder bendier knottier handier bounder finder niter minder maunder vender cindery hounder mender paintier nettier gander runtier daintier ender founder needier tindery randier ponder needer lender kneader snottier lander nittier jauntier sandier nattier sonder pinder denuder wander reuniter bindery render sunder dandier tentier undoer windier yonder
snide sand sandy sanity send seniti sned snit sonde sundae sundew