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.
piosities posties pistes posits pasties posts pastis paucities pastes poussettes possets pasts pastas pseuds pistous posadas passades passadoes pussytoes pests
piosities sites sties societies resites posties cities suites ascites beasties fascitis coesites hessites gaseities miscites nasties pasties paucities raucities cecities zoisites sits