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.
parole parolee parle parol prole parley pyrrole payroll prowl pearl pyrola parlay pearly parral pyrrol parrel puerile purlieu purl peril prill poorly purely
role prole pyrrole parole troll pyrola dariole neroli virile rule barley farle burley ferlie birle broil curlew charlie growl morale ferule orle carriole parley carol aureolae rale payroll aureole drool droll roll carle triol curule reroll prowl caroli variole hurley rile roil ferrule areolae merle girolle charley parle oriole nerol creole parol parolee areole cariole girlie puerile pyrrol chorale
pro par sparrow spar pair para parae pare pareo pareu pariah parr parry pear prao proa prow pyro spare sparry