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.
pros pross prows proso pyros praos prosy prose proas porose parous porous pareos pars purs prossie pyres pores prees preys priss pries prise prays peris pares prese puris paris praus prase purse parse piers parrs pours perse presa paras purrs peers press pairs pears peres pursy hypers peruse paries pursue praise pareus purees pooris prissy pariahs parries peeress peeries perries prez price pricy prize
biros bros chiros charros toros taros duros saros burros eros euros faros pharos heros giros gyros guiros kouros morros pros pyros ceros zeros hydros tiros tyros cheeros churros