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.
serosas saroses soroses sorosis xeroses xerosis seeresses sericeous ceraceous cercis cerises ceruses sources xeruses
serosas roses xerosis sorosis broses bursas eroses pharoses viroses virosis hearsays neuroses neurosis proses prosos pyrosis saroses soroses xeroses warsaws
serosa serosae sers ceros saros sears seers seres serious serous serows suers zeros users