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.
perilous perils parlous perillas pearls prills peerless purls prowls parols parlays parrals parrels pyrolas pyrrols payrolls purlieus parles proles
perilous brillos variolous garrulous querulous parlous zorillos troilus
peril perilla pearl pearly prill puerile