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.
praise prase prise price paras parse purse priss peris prose perse proas paris praos pries praus pairs prays prese prize puris peruse porose paries pooris pricey pursue prissy prossie perries parries pariahs peeries purs pros pars prez pours pross preys purrs pricy pares prows press proso pyres prees peers parrs presa prosy pyros peres pears pursy piers pores pierce pareus piracy pareos hypers parous porous purees peeress
raise braise praise fraise reraise ariose laris grease crease carse hoarse fairs birse arise rase arse hearse phrase coarse pairs parse erase cerise serais deairs terais urase wairs marse raias hairs airs wrasse mairs lairs frise cruise rais rise gyrase bruise braize frisee prase vairs paris pharisee naris prise rerise saris souaris hydrase triose urease chairs
pair para parae pariah peri prao prau pray proa puri rapier spray