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.
paralyse paralyze parlays parleys parrals parles parols pearls parrels parlous paroles parolees pyrolyze payrolls purls perils prills proles prowls pyrrols peerless perilous purlieus pyrolize pyrroles
paralyse realise moralise paralyze ruralise serialise
parlay parle parley parol parole parolee parral pearl pearly