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