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.
snook sink sank snog sunk snaky sneck snack snake snick snuck sneak sneaky snakey sang sing snag snug song sung sync zonk
nook snook chinook shnook knock nock nooky bannock bonnock enoki winnock