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.
santur santour santir santero saunter santera santoor sanitary santeria sanatoria sanitoria sander sinter sanitaria sentry centaur century senator sandier centaury snootier ceinture snottier snoutier sonneteer centaurea center sundry sonder sunder sender snider centra centre zander centare sounder
santur saunter wintry santour quintar entry bunter gantry gauntry antra pantry mounter punter nature cantor gentry reinter reenter jointure antre miniature tenter shunter chantor wanter centra intro century enter chaunter renter contour banter sinter qintar denature mantra tantra centaur counter fainter painter ranter reentry geniture canter venter pointer minter vaunter hunter gaunter country haunter venture quainter santir winter jointer mentor contra cointer ceinture denture linter daunter kantar sentry hinter renature taunter chantry venturi centre inter center tinter chanter chunter yantra
santo sained saint sand sandy saned sanity saunaed sent sente senti snit snot snotty