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.
fascitis fasciitis fasts feasts fastuous fests vasts visits fossettes phaseouts fists vests facets feists foists ghosts
fascitis lucites dacites cecities recits recites raucities piosities paucities miscites leucites cites gaseities fasciitis ascites zitis cities cists deceits