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.
gruels growls grills grilse guerillas graals grails gorals garrulous creels guerrillas grilles carrels creoles goorals cureless creolise careless quarrels coreless crewless gorillas carrells carls curls querulous krills carles crawls kraals craals corals carols carless carolus corrals curlews carioles corollas creolize criollos
gruels reals oriels neurulas morulas merls curls quarrels riels carrels rules ariels barrels burls sorrels saurels trulls purls reels ferulas carrells nurls knurls morels laurels creels ferrels jurels hurls ferrules herls furls ferules sorels cereals torulas parrels churls
gruel cruel cruelly greyly guerilla guerrilla