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.
kiosk cossack cask cusk
kiosk bisk bosk bosky mosk risk risky disk whisk whisky
kis kos kiss kissy koas kois koss kousso skis