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.
peeresses presses perses peruses prosses prisses pareses parses prezes purses prises prases proses process parises precise pierces paresis praises precess precieuse precis prices prizes prosos pursues pyrosis piracies precious prissies prossies
heiresses cresses seeresses caresses duresses dresses presses peeresses tresses brisses diaereses prisses morasses phoresies brasses drosses harasses frasses diureses cereuses creeses trusses grosses whereases creases phereses grasses crosses resees cuirasses karosses prosses reuses wrasses pareses trasses heresies greases boreases foresees ureases diereses chorusses
peeress peers peres peeries speers