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.
prossie prose pross porose pros parse proas proso praos press price prosy pyros pries perse purse priss prows prese prise prase prize praise peruse pursue porous pricey prissy pareos paries parous peeress parries perries peeries purs prez pars pyres pares presa pricy preys pairs puris peers parrs piers prees peris pursy prays paras praus pores peres purrs paris pears pours hypers pareus pierce pooris purees pariahs