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.
creeses cresses creases caresses curses crises crases cruses corses carses crosses greases courses cruises carouses cuirasses cruces crasis crisis crazes gorses krises crozes grosses coerces kerseys grasses grouses carices crazies karosses curacies griseous carassows curassows coriaceous graces grazes coryzas grecize
creeses phoresies ureases tresses dresses diereses seeresses presses perses pareses cresses creases caresses heresies heiresses verses phereses recess freezes erses breezes boreases reuses resews greases peeresses precess cereuses diaereses diureses duresses uraeuses whereases
creese cares caress cores crease creasy cress cressy crews cries cures grees acres screes