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.
parle parole parley parolee parol pearl prole parral pearly parlay parrel purlieu payroll purl puerile pyrrole peril prill prowl poorly purely pyrrol
farle parle carle birle burley curlew barley hurley nearly gnarl merle role rile marl rule aril early parol pearl prole pyrrole charley chorale virile farl aryl morale pearly puerile parley parole ferrule carol rale ferlie orle charlie dearly gnarly marly jarl curule earl carl girlie harl ferule yearly
par pair para parae pare pareo pareu pariah parr parry pear spar spare sparrow sparry