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.
nucleus knuckles nuclease nickles neckless knockless nickelous nicols nickels niggles necklace
nucleus clues pickles heckles knuckles macles mickles coles coleus aculeus loculus boucles buckles deckles socles tickles scales chuckles ruckles hackles clews cockles oculus nickles muckles mackles macules locales keckles locules huckles cackles jacales suckles sickles tackles cycles chicles recluse shackles