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.
kanaka kink konk kiang kinky kaonic guanaco
kanaka knack punka punkah snack snake snaky sneak tanka
kana kain kane kaon kina koan kuna