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.
swank swanky swang swink swing swung sawing sewing sowing
wank swank wink wonk swang swanky swink twang twanky chewink
swan swanny sewan swain swine swinney