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.
prang parang prank prong paring poring puranic preeing peering pouring parring pairing purring paranoic pureeing prink paranoiac
rang orang parang prang wrang ourang frank lairing earing burring garring fairing rank birring gearing earring jarring bring fearing prank franc daring roaring peering drank poring searing marring brung siring herring nearing wring gnarring tearing shrank shoring sheering sharing choring chirring charring chairing whoring wearing waring tyring trank tiring wrong caring taring bearing pairing soring heiring furring cering hearing erring rearing purring iring barong coring raring hiring soaring queering firing sering wrung during parring jeering gyring crank prong curing paring muring rung baring leering quiring boring veering miring luring pouring haring deairing airing touring ring louring brank sarong mooring goring souring oaring curring tarring barring faring tranq tiering wairing warring whirring wiring charing cheering choiring churring shearing shirring showring yirring
paranoea paranoia pernio pirana pirn porn porno porny prawn prone prune purana pyran sprain