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.
careless carless cureless coreless crewless carles carrels creoles carls carioles carrells creels carols carrioles carolus curlews creolise creolize quarrels curls corals craals crawls gruels corrals grilles criollos garrulous gorals graals grails grills growls kraals krills
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
carl carle carol caroli carrel carrell creel creole cruel cruelly