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.
peril puerile perilla pearl prill pearly purl prowl parol prelaw pyrola purely parlay poorly parrel parral pyrrol payroll
peril merrily roil rile virile hoarily gharial nerol trail airily sorrily fierily eerily ceorl prill seral frill grill rail drily sheerly cheerly zoril aerily drail rill charily ferial riel merl trill gorily urial queerly wearily rial pearl merle serial frail serail reoil puerile earl ferly aril ariel tearily narial furrily herl verily brill beryl grail drill oriel leerily burial warily krill triol curial trial broil chorial feral wirily brail derail aerial zoarial cheerily shrill
peri per opera apery aper puri pier perry perea pereia pere peery peerie peer pear pariah speir