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.
santeria santera sanitaria sanatoria sanitoria saunter santero sander sinter santir santur santour santoor sandier snootier snoutier snottier sanitary sonneteer snider sunder sonder sentry sender centra center zander senator sounder centaurea centre cinder sundry
santeria niterie nutria entera sanatoria sanitaria sanitoria santera tentoria
sained saint saned sanity santo sente