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.
santero saunter santera santeria sander sinter santir santur santoor santour sandier snootier snoutier sanitary snottier sonneteer sanatoria sanitoria sanitaria sender center zander sentry sunder sonder snider sounder senator centra centre cinder sundry centare centaur century cindery
montero santero intro inter jauntier hinter haunter hunter painter pointer nitro punter venter reenter mintier reuniter lintier lientery center keynoter vaunter niter sinter daunter taunter tentier uniter winter chanter chunter renter pointier counter minuter canter paintier gaunter noter banter jointer enter entera bunter cointer ranter fainter quainter reinter mounter rentier minter runtier linter santera saunter daintier dinitro tenter tinter wanter wintery chaunter shunter
sained saint saned sanity santo sente