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.
drily drail drill dryly drolly drooly drawly dourly direly dearly derail dirl tearily dariole hydrilla drawl droll drool dural trail trial trill triol truly trolly trawley trolley tirl
airily sorrily tearily merrily cheerily charily verily eerily furrily hoarily aerily warily wearily fierily drily gorily leerily wirily serial parley nearly barely grail barley roily sorely brail serail rile drill hurley aerial hourly brill curly gharial rill frailly derail zoril trill yarely shrill chorial burley dryly whirly queerly truly dourly fairly trail oriel ariel burial early knurly frilly frail surly girly rail rely zoarial broil aril grill surely parlay marly direly rial rarely riley curial peril prill ruly narial puerile burly sourly krill pearly purely frill gnarly dearly ferial merely ferly roil wryly charley riel poorly hurly trial triol urial virile drail cheerly sheerly shrilly yearly