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.
suk suck souk sucky sky suq ska ski sukkah syke sika saki soak sike sook skua sock skee skew seek sick sake soke sack zouk segue sicko skiey socko squaw sickee sickie