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.
merls merles marls morals morels murals morulas morelles morellos morales
herls merls carles quarrels furls earls byrls farles borals marls birls corrals beryls curls carrels carols gorals jarls sorels burls morels churls nerols whorls tirls reals barrels gnarls cereals zorils orals hurls orles parrels perils pyrrols parols ferals arils ariels corals girls birles aryls creels farls carls saurels riels virls ferrels reels harls carrells goorals gruels arles parles sorrels purls pearls parrals oriels laurels nurls ceorls morals murals merles jurels dirls whirls knurls chorals shorls
merl merle marl marly merely merrily