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.
puerile peril purl perilla prill pearl parle prole parole parley pearly purely parolee pyrrole parol prowl parlay parral parrel poorly prelaw pyrola pyrrol payroll purlieu
puerile rile derail zorille serail oriole variole peril merle grille carriole cariole virile fierily verily leerily riley ferlie ferial eerily aerily aerial rille ferule serial dariole cheerily
peri puri peerie pereia per pur