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.
parlay parley pearly parle parol pearl poorly purely prelaw parral pyrola parrel parole parolee payroll perilla purl peril prill prole prowl pyrrol puerile purlieu pyrrole
parlay relay parley leerily merely gorily pyrola poorly sorely hurley girly verily surly sourly direly ferula drily hoarily ferly tearily fierily truly eerily wearily early wirily fairly charley morula cheerly neurula yarely knurly aerily burley hourly nearly pearly marly merrily queerly rarely purely sorrily hurly curly virelay dearly surely dourly ruly rely dryly wryly torula furrily warily barely whirly barley charily airily cheerily gnarly sheerly burly yearly
par pair para parae pare pareo pareu pariah parr parry pear spar spare sparrow sparry