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.
peeress peeries press peers peres perries piers peris pries priss pears pares prees pyres presa prese pross pores preys pareus prissy pierce hypers paries pareos purees parries prossie prez purs pros pars puris prays praos prows paras paris proso proas parrs pairs perse prosy pours praus purrs pursy pyros parous peruse pooris porous pariahs
peeress seeress whereas dressy zeroes seres ceres peres cereus press peeries nereis queries faeries feres tress veeries haeres eyres tressy dress series aeries heiress meres quaeres cressy cress caress heroes heresy heres duress wheres res ers
peer pere peerie peery perea pereia peeper speer per