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.
santoor santour santur santir sanatoria sanitoria saunter santero senator santera snootier santeria sanitary sanitaria sinter sander sentry sandier snottier snoutier sonneteer sunder center centra sender centre snider sonder sundry zander centare centaur century sounder
santoor indoor genitor janitor cantor contour mentor monitor pandoor santour senator donator tandoor chantor