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.
tireless treeless tirls tearless trailless trellis trolleys doorless trawleys dirls terrellas trolls triols trawls trails trills trials trulls troilus torulas darioles trollies drails drawls drills drolls drools
fireless tireless treeless ireless shoreless coreless careless cureless wireless cheerless juryless oarless doorless merles berryless earless fearless arrowless areoles browless crewless rayless barless weariless airless braless reales carless furless morelles heirless relies peerless creoles aureoles tearless gearless trailless hairless warless