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.
parasol parasail parsley parcel presell prosily pursily porously prissily perusal presale pricily
girasol parasol brasil aerosol phrasal girasole girosol cresol hydrosol
paras pars spars proas prays praus prase praos pears praise parse parrs paris pariahs pares pairs sparse