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.
tearless treeless tireless trailless darioles trollies doorless trawleys trolleys tirls trolls triols trails trawls trials trills trulls trellis troilus derails terrellas dirls drails drawls drills drolls drools
barless fearless cheerless warless earless oarless peerless tearless airless furless carless heirless gearless doorless hairless rayless arrowless browless burleys crewless birles hourlies hurleys weariless hurlies curlews riles ferules ireless pyrroles arles carles whirlies ferlies rules girlies shoreless orles rales proles wireless parles cureless morales berryless fireless braless farles roles charleys trailless ferrules careless coreless paroles tireless treeless juryless barleys charlies parleys chorales merles yearlies