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.
dresses duresses tresses drosses diereses diureses druses diaereses trusses drowses trasses dieresis hydrases diuresis derrises diaeresis torses trousseaus trioses terrases tarsus terces torsos traces trices truces tierces
heiresses seeresses peeresses duresses dresses presses cresses tresses caresses prosses verses harasses reassess erses reuses heresies phereses crosses cuirasses grasses frasses phoresies creeses uraeuses diaereses whereases diureses trasses wrasses prisses karosses greases morasses brasses pareses boreases grosses diereses resees perses brisses creases cereuses foresees trusses ureases drosses chorusses
dress dressy dares daresay drees dries dross drossy dures duress tress tressy