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.
sink sunk sank sing sneck sneak snick snuck zinky snake snack snaky snook suing zincky snakey sneaky seeing song sung snug snog snag sync zinc zing sang zonk sanga sonic
boink fink ink gink jink kink link mink oink pink reink rink sink dink wink chink